Bike Check: 8.85kg Orbea Oiz Race Bike

May 5, 2022 at 7:08
by Ed Spratt  

Photos: Brujula Bike

Brujulabike in collaboration with Orbea have put together a super lightweight XC race bike using Orbea's Oiz full suspension frame. Hitting the scales at a very low 8.85kg this bike was built to be light but also strong enough for World Cup racing. Pretty much every part of the build has been tweaked to drop grams including changes to derailleur cages and plates, seat clamps and crank preload adjusters. Check out how this bike kept such a low weight below.


Orbea Oiz Details

Frame: Orbea Oiz OMX Talla M -1740 g (rear shock included in the weight)
Fork: Fox 32 Float SC Factory 100 FIT4 Remote-Adj Push-Unlock QR15x110 Kashima (1418 g)
Rear shock: Fox i-line DPS Factory 100mm Remote
Wheels: Bike Ahead Biturbo RS 27 mm internal width (637 g front / 736 g rear)
Tyres: Pirelli Scorpion XC RC Lite (604 g each)
Brakes: Hope XCR (195 g each)
Discs: Ashima ai2 160 mm 6 bolts (73 g each)
Handlebars: Darimo MTB 740mm (108 g)
Headset: Acros Alloy 1-1/8 – 1-1/2” Integrated
Stem: Darimo 80mm -6º (62 g)
Grips: Orbea (44 g)
Seat post: Darimo T1 Loop 31.6 (93 g)
Seat clamp: Saddle lock Darimo Sub4 (4 g)
Saddle: Saevid Alien Short (70 g)
Bottom bracket: Kogel bb92-Dub (56 g)
Cranks: SRAM XX1 (425 g incl. Kogel's crankset preload adjuster)
Preload adjuster: Kogel (10 g)
Chainring: SRAM XX1 34T
Chain: SRAM Eagle Rainbow
Derailleur: SRAM XX1 Eagle AXS
Shifter: SRAM XX1 Eagle AXS (87 g)
Derailleur cage: Kogel Kolossos 14-19 ceramic (97 g)
Cassette: Garbaruk 10-50T (337 g)
Bolts: Kogel Titanium (8 g brake disc bolt set)
Valves: Damoff Aluminium 48mm (12 g set)
Stem and derailleur plates: Hopp Carbon
Pedals: Exustar MTB EPM215TI (112 g each)
Bottle cage: Carbon TI (10 g)

This incredibly lightweight XC bike hits the scales at just 8.85kg (19.5 lb).


To help drop some weight this build uses custom derailleur plates from Hopp Carbon and a Kogel Kolossos cage.

For this build a Darimo T1 Loop seatpost has been chosen with an amazingly low weight of just 93 grams.


To keep the weight low for the cockpit setup the Orbea is built with Darimo MTB 740mm bars, a Darimo 80mm -6º stem and Orbea foam grips. These three items weigh around 210 grams, this is around 50 grams lighter than the one-piece Syncros setups that are used at the XC World Cups.



Used by World Cup racers this race-ready build is running the Bike Ahead Biturbo RS wheels with a weight of around 1400 grams. Interestingly there are lighter wheel options than this like the Roval Control SL Team Issue wheels that weigh 1240 grams.


When it came to saving weight on braking Hope's new XCR brakes were chosen with Ashima ai2 160 mm rotors weighing 73 g each.



To ensure a water bottle could still be held on the bike an amazingly light cage was used that weighs only 10 grams.





157 Comments

  • 116 4
 19.51 lbs for all the lazy Americans out there.
  • 84 0
 roughly 14,400 peanuts is closer to the standard American units.
  • 70 0
 78.04 Quarter Pounders
  • 26 0
 40 Big Gulps . . . . or just 6 and a half Double Gulps!
  • 40 1
 25 cans of Coors Light for all the alcoholic's out there.
  • 9 2
 @scallywagg: omg people really drink it?
  • 14 0
 @bok-CZ: savages drink it.
  • 3 1
 @bok-CZ: it's massively popular with all my buddies from the UK, that's ALL they'll drink...
  • 2 0
 @noplacelikeloam: 40 big gulps would weigh approximately 75 pounds give or take for ratio of ice to fluid.
  • 12 2
 @scallywagg: Alcoholics? You think alcoholics consider Coors Light beverage alcohol?
  • 4 0
 @arek: if you consume 25 cans of Coors Light you're either an alcoholic or in a frat, so yes.
  • 7 0
 @noplacelikeloam: Had to google it, wtf, why would anyone need to have a sugary, fizzy drink this size? I cannot comprehend it. Thought half a litre was a big drink. People are nuts!
  • 2 0
 @noplacelikeloam: lol, of course
  • 5 0
 @gooral: Truckers when the meth related sugar cravings kick in.
  • 2 1
 @arek: !!! Is it even available here? I had it in a America “pint of water please barman”.
  • 1 0
 @scallywagg: Or just incredibly well hydrated.
  • 1 0
 a case of monster or redbull from costco
  • 84 1
 Super strange how they want a strong competitive bike and use unnecessarily heavy wheels and then put light rotors which work awfully on there
  • 2 0
 Just what I was thinking
  • 25 0
 Also orbea claims you can save 100g if you go with the raw option.

bikerumor.com/orbea-drops-up-to-100g-off-top-orca-alma-oiz-rise-with-raw-myo-carbon-frames
  • 53 2
 Those rotors appear to be missing the braking surface to save weight.
  • 30 0
 @radatabs I got a weight weenie friend that runs those rotors, and if you don't replace them on time when they're worn, I've seen them self destruct. Good times ensue, as long as you're the one watching....

Oh, and the deli slicer pattern eats pads at an obnoxious rate. But hey, THEY"RE LIGHT!
  • 2 0
 @Bob-Agg: it's faster that way too.
  • 3 1
 These wheels weight 1369 grams,is that heavy?
  • 3 0
 @nozes: I was thinking the same thing. Like there's less than a handful of xc wheelsets that are below 1300 so comparing these rotors to sram centerline you are saving the 100 grams you could've possibly saved on wheels. Plus I just really like the look of these wheels...
  • 6 1
 @Bob-Agg: I run the 140 versions on my gravel bike and they work just fine.
  • 9 0
 @nozes: It's a decent weight but you can go sub-1 kilo these days if you REALLY want to build a proper light bike.
r2-bike.com/PI-ROPE-Wheelset-29-RL-SUB1-Carbon-Gen1
  • 2 0
 @rarerider: could you swap the free hub to microspline? These look awesome
  • 3 0
 And valve stem caps?!
  • 6 0
 And that they’d use AXS... it’s heavier than the regular Eagle XX1.

Not that I care about weight tho.
  • 4 0
 @louiefriesen: No, AXS is actually lighter, believe it or not. One article said it was 5g lighter, so it makes all the difference Wink
  • 2 0
 @laupe: I have both. "My" XX1 AXS is 23g heavier than the XX1 I took off. I have a L 2021 Epic but I doubt you would save 20g in cable from a L to a Medium frame. Personally, there is a lot more time made in the perfect shift every time than the 23g savings by sticking with cable shifting.
  • 2 0
 @WRXJim: Ok, nice. The article i read probably measured stock cable and housing. And yes there are a lot more you get out of perfect shifting vs lighter drivetrain Smile
  • 2 0
 @louiefriesen: cable housing and cable will weigh over 50 grams on any size bike, AXS is lighter marginally
  • 2 2
 @WRXJim: cable housing and cable will weigh over 50 grams on any size bike, AXS is lighter marginally
  • 1 0
 @fastbike99: ik that now I’ve been reading the comments.
  • 59 1
 is the seat held on with string?

i think the seat is held on with string.
  • 8 0
 Same material as Berd spokes: UHMWPE.
  • 9 0
 I would not trust the seat clamp to survive long in today's courses -- unless you stand the whole time.
  • 12 1
 Go with lighter wheels to offset the weigh of a real seatpost clamp and better discs.
  • 4 0
 @mrkkbb: You mean the mount of the saddle? I run that exact seat post with the loops for years now and it never failed. I have it on my (8.5 kg) XC fully and I also ride Enduro trails with it. It's perfectly fine!
  • 3 0
 @proxient LOL!! That made my day.
  • 1 0
 @mrkkbb: 2mm UHMWPE cord has a tensile strength of close to 1000kg. It's plenty strong enough for this application.
  • 1 0
 @dsut4392: Exactly, isnt that cord like twice as strong a steel of the same dimension?
  • 3 0
 i think the seat is held on with string......Brilliant comment Everyone else. Whoosh.
  • 58 0
 Huck to flat please
  • 22 0
 Huck to snap
  • 28 0
 removing the valve caps would save a little more
  • 15 0
 And the decals on the fork!
  • 16 0
 @SCCC120: Or removing half the fork! Oh wait...
  • 6 0
 I always wonder why they all run such long tubeless stems as well. Not like you need them that long to get a pump on.
  • 23 0
 Shave the little hairs off the tires too
  • 1 0
 I'm pretty confident that xx1 mechanical is lighter even with cables aswell, there's also a few lighter wheels out there and the frame can be raw to save weight, and eewings are lighter than xx1 and im sure theres more niche cranks which are even lighter. they didnt do the lightest build they could.
  • 3 1
 @B3NBiker: AXS is actually about 5g lighter than mechanical XX1. And if you are thinking about eewings titanium cranks, they are not lighter, eewings: 400g, XX1:363g boh without chainring.
  • 1 0
 @laupe: I looked at weight of xx1 with chainring vs redwings without, I think there definitely are lighter cranks than xx1 though. From what I found, xx1 axs shifter and derailleur with batteries weighs 457g and xx1 mechanical derailleur and shifter with inner cable and no outer cable weighs 389g and I don’t think the outer cable will weigh 70g. I could be missing something though so there’s the links to what I saw

bikerumor.com/unboxed-sram-eagle-axs-xx1-xo1-actual-weights-install-notes

bikerumor.com/sram-xx1-x01-eagle-specs-actual-weights
  • 1 0
 @B3NBiker: Just found out that E Thirteen XCX cranks are lighter, but lots of horor stories with them.
Axs weight with bar clamp is 457, without clamp 445g. Mechanical is 388g. 445-388=57g. I just checked the outer housing on my orbea oiz and the weight is about 60g. So about the same wheight Smile
  • 15 0
 Shit, that's a kilogram lighter than my gravel bike.
  • 11 1
 just put 1L water bottle on this bike, and you are on
  • 4 0
 @jpnbrider: it would have to be slightly less than 1L. You have to factor in the weight of the empty bottle.
  • 4 0
 @danielfloyd: Good thing my water bottle is only 2.5 cups.
  • 5 0
 @jpnbrider: If you make this bike heavier they will weight the same!
  • 11 0
 "but also strong enough for World Cup racing."

Those rotors are not strong enough, potentially downright dangerous, for a WC race situation. They are known to wear extremely fast and fail catastrophically when they fail; and in a race no one is going to go easy on their brakes near the end of, say, a long muddy race that has already chewed up their pads and rotors.
  • 1 0
 Was thinking the same thing. I wouldn’t trust those rotors even on a kids bike
  • 2 0
 @chadtague1: I run these rotors with Magura and they work amazing, especially for XC brakes,they seem to be very reliable.
  • 1 0
 @iliketorailcorners: Ive been running them for years too. No issues... They do get brake fade though on loooong descents. (touches wood Big Grin )
  • 16 1
 Dangerholm: 'Pfff. Hold my beer.."
  • 3 0
 I have to agree. While this is a nice build and I respect the effort, we have been spoiled by Dangerholm's spectacular builds. This build lacks the polished details and refinement we are used to seeing in these super bike builds.
  • 11 0
 1 kilo lighter the moment the water bottle gets ejected the moment you hit dirt .
  • 4 0
 I was thinking this too. Bye bye water bottles
  • 9 0
 I see they used carbon thread for the seat clamp (never seen that before, cool) yet not for a lighter wheel build using carbon thread for spokes. Missed opportunity to make this a sub 19 lb bike.
  • 3 0
 [Edit] "advanced polymer thread," not carbon thread.
  • 9 0
 Surprised they didn't use a lighter fork like Sid SL and a lighter wheelset. Then they could've been even lighter, or same weight with better rotors or maybe even a dropper
  • 2 0
 lighter cranks, brakes, drop the lockout...
  • 1 0
 @IsaacWislon82 Suspension came stock, so i guess they didn't bother changing it, wheelset doesn't make sense unless you want mega stiff wheels.

@aer0 Which cranks are lighter?
  • 2 0
 @laupe: loads of super light cranks, E Thirteen XCX or THM for super bling.
As for wheels, something like Roval SL's or any number of super light options using Tune, Carbon TI, DT180 hubs... you can still have nice complaint wheels.
The reason I suggest suspension is I have the same bike, its Push to Unlock by default. This can be changed to Push to Lock easily or three position levers quite easily for a more user friendly solution with less weight.
  • 1 0
 @aer0: Ok, the E thirteen are a lot lighter, but lots of horror stories with them.
As for wheelset i meant that the Biturbo RS doesn't make sens for THIS build (as it's heavy), unless you want super stiff wheels.
I also have the same bike, but why would you change it to Push to lock?
  • 2 0
 @laupe: regarding push to lock, for 99% of single-track XC racing you would have your suspension setup tuned to be in open mode surely? that's how I operate anyway... then for those climbs on wide 4wd road, tarmac sprints etc then you would enable the lockout
  • 9 0
 man I've eaten steaks that weigh more than that thing...
  • 38 0
 Nationality checks outs
  • 21 15
 My Transition Spur is only 4lbs heavier and can actually take abuse. I'd be scared to ride this thing over a speed bump....
  • 28 10
 I'm guessing the owner of this bike rides a hell of a lot more, and a hell of a lot faster/harder than you do.
  • 7 0
 I have absolutely no trust in that seat clamp using the carbon thread...as cool as it is
  • 2 0
 @LeDuke: Probably rides like that on another more capable bicycle.
  • 1 1
 @SATN-XC: It's the same material used in Berd spokes, climbing ropes, ship cables, tow ropes for off--road vehicles, etc. Not "carbon thread".
  • 1 0
 @LeDuke: thank you, "advanced polymer thread" ....I didn't know what they were called.
  • 4 0
 @SATN-XC: just call it dyneema so at least a portion of people might know what it is

I’d rather have the market monopolized by one brand with a catchy name than write out “ultra high molecular weight polyethylene” every time
  • 2 0
 One of the Orbea OIZ that won the Cape EPIC was a "regular" mid range OIZ TR 10 (120 mm version) OMR frame. Thats kinda slap in the face of the factory stuff.
  • 2 0
 In most cases they didn't use the lightest parts. I don't know the discs but the rest of the parts are all very sturdy despite its weight. For example I have almost all of the daring stuff on my (even lighter) XC fully and I race with it and also ride Enduro trails. Never did something break in over two years now.
  • 1 0
 @SATN-XC: I ride that saddle mount and seat post for several years now. Never had any problems.
  • 2 0
 4lbs is a 20% weight increase, thats pretty significant.
  • 7 0
 That seatpost looks like it wouldn't survive a speed bump
  • 4 0
 Quite heavy on the wheels though. The Duke SLS3 Ultra with Acros hubs and Sapim CX Ray, weigh in at less than 1.2kg.. Just saying..
  • 6 0
 yup. numerous places it could have been made lighter, tyres, derailleur cage, brakes. I would have used lighter wheels, installed a short travel dropper post such as bikeyoke divine SL & ended up much the same weight.... but being picky as it IS a cool bike & I bet its a rocketship
  • 1 0
 @scantregard: I agree
  • 2 2
 How is 1369 grams "quite heavy"?
Obviously the goal here wasn't building the lightest bike possible,or another components would have been used.

Using these wheels the bike gets lots of attention,and I think that is the main purpose of the build.
  • 2 0
 @nozes: I am sorry, but if you use Darimo, Kogel, Garbaruk and other exotic lightweight parts, your goal is to make it light. That's how I see it.
Building an 8.8kg XC, is pretty much a statement. They could obviously go lighter, eventhough Bike Ahead BiTurbo RS is extremely beautiful and exotic, they might have used other brands to go lighter.
  • 1 0
 @yetiyot: Garabaruk stuff is know for being fragile/light. My Garbaruk cassette has been bomber.
  • 2 0
 Should have went with a KCNC Ti 11 speed cassette at 11-42 with a 32t chainring and XTR derailleur, saved an additional 200g or so. Since this is an World Cup XC level race bike neither the highest or lowest gear ratio here is of any use to the ideal person riding it and Eagle gear absolutely does not rule the roost in terms of weight given its all build around massive cassettes.
  • 2 1
 Weight limits on any of those components? Bike weight alone is kinda useless without knowing what it can handle. While it would be interesting to shred a bike that weighs less than 10% of me, it would probably shortly be either: very very interesting (picking carbon shards out of skin), or completely uninteresting (an un-catastrophic failure but un-ridable none-the-less).
  • 3 0
 Extralight CarboCamber 330 wheelset is at 990g with BERD spokes (1070g with bladed spokes)! Gucci of all low weight wheelsets. 30mm ID too!
  • 1 0
 Yes, i have a friend with a 992g wheelset
  • 2 0
 @laupe: I have an 896g wheelset with BTLOS/Extralite/BERD, only 22mm inner diameter though.
  • 1 0
 @EdSawyer: Nice!
  • 1 0
 Interesting choices. I wouldn’t touch those rotors though, could have added galfer for like 5g ea…
I still prefer my build, oiz TR omx, 120 front and rear, with 120mm dropper. Full xtr, mt8 brakes, and power meter. Comes in at 20.6lbs. So comparable that’s 1lbs well spent. Oh and at the time I picked up this bike for $6000. www.vitalmtb.com/community/marktuttl3,49559/setup,45181?ptab
  • 1 0
 you can save so much weight so easily go to something lighter and still reliable like the bontrager xxx's or berds xc wheels you can save money and weight on cranks by going to hollowgrams with a powermeter this shit mad heavy tbh
  • 4 0
 Rad called, they want the Mags back.
  • 6 1
 Scrape the paint off (:
  • 9 7
 Anything without a dropper is a gravel bike. Even an XC hardtail with a dropper and modern geo would cone out lighter, cheaper, and faster on a lot of courses.
  • 2 0
 That seat post clamp looks like spray painted twine...perhaps that 93 gram carbon saddle becomes a projectile weapon when this rig disintegrates at the first rock sighting?
  • 4 0
 Doesn't AXS weigh more than the standard set up?
  • 1 0
 possibly (I haven't checked weight).... but not if you factor in the removal of cable, housing, and bolts related to same.
  • 3 0
 Mechanical can be lighter, especially with some of the boutique super-light cable/housing systems out there. The real weight-weenie choice is XTR mechanical with fiber cables and super-light housing.
  • 4 1
 It’s definitely heavier. Weird article. “We made a light bike but weirdly selected some heavier options for no reason”
  • 1 1
 AXS is actually 5g lighter than mechanical
  • 3 0
 @laupe: Nope: www.bikeradar.com/advice/buyers-guides/sram-x01-eagle-axs-vs-shimano-xtr-m9100

And - AXS is sprung weight too, whereas XTR is ~150g less sprung weight.
  • 1 1
 @Linc: XX1 AXS is lighter than XX1 mechanical, was what i was thinking about, not comparing to shimano.
  • 2 0
 @laupe: maybe with stock cables and housing, and then at what length? But there are options to shave weight over those stock housings and cables, as I said before.
  • 1 0
 @justinfoil: Yes, stock.
  • 2 0
 Most FS race bikes are 10-10.5kg. Anything less is a compromise, but this frame is super light, especially when using a small or medium.
  • 3 0
 That’s great and all, but there’s a reason why World Cup racers are racers are running 34s and dropper posts.
  • 3 0
 19.5 lbs is superlight. What is the cost of that bike? Probably insane.
  • 2 0
 The Bike Ahead Composites Wheelset alone is 3500 Dollar, made in Germany - yup, pretty expensive!
  • 3 0
 Can see another 250g to drop (picolla brakes, paint strap, wheelset)
  • 2 0
 At least!
  • 2 0
 A frame (with shock) that weighs only 200-300 grams more than a fork? That’s crazy
  • 1 0
 Yes, i haven't thought about that, but that's actually insane
  • 3 0
 those are actually good tires. cool to not see maxxis for once.
  • 3 1
 That cassette shifts like a turd and wears faster than an Apex road cassette which is 300 miles.
  • 1 0
 A sanded frame away from a Dangerholm build. A little silly but a cool exercise in trimming grams.
  • 2 0
 they could save half a pound by using BERD wheels.
  • 2 0
 This weighs approximately as much as 2.269 gallons of milks.
  • 2 0
 I guess I have a new goal for my xc bike weight now.
  • 1 0
 Is this bike so light that it will sent me soaring through the air when I hit the slightest bump?
  • 1 0
 Riding Ashima rotors down a trail that actually requires full suspension, to me just screams 'Darwin Award'...
  • 1 0
 Loving the seat clamp. Berd Tech?
  • 2 0
 @tmxownrsgrp Really?! I was just thinking about how annoying it would be to set-up / live with.
  • 3 3
 @krka73: Live with? How often are you moving your seat around?
  • 2 2
 @justinfoil: Where do I start? Set up, nightmare getting strings around seat rails unless you're an ace at tying your own fish hooks. Install has got to be annoying because everything is loose and floppy while you try to get that initial tension. Adjustment, getting the strings sitting exactly where you want on the rails when you finally get to your fore-aft. Seat angle, torquing bolts, threaded barrel twisting against string tension, good luck.

Riding, strings as mud catchers. Crash, if your saddle gets slammed out of adjustment, good luck dealing with that on the trail.

I can't think of anything but weight and looking nifty as a positive about the design.
  • 3 2
 @krka73: That's all install.

Mud? Wash it.

Crash misalignment (well, I'd bet something's broken anyway, but...), just need to loosen and realign, not necessarily gonna need to rethread or retie.

Lack of weight and looking nifty are THE positives, that's the whole point.
  • 1 0
 @justinfoil: Cool, different strokes for different folks. Perhaps buy one & enjoy. Hard pass for me in perpetuity.
  • 2 2
 @krka73: then why did you feel the need to say "Really?!" when OP said they liked it? Different strokes and all, except when you don't like something.
  • 3 1
 @krka73: Actually if you have two hands it is not that complicated. I have that seat post since three years now and I did install three saddles on it. Here's a video with instructions. Does it take longer compared to a "normal" saddle mount? Of course. But it's on in under five minuted even if you do it the first time.

Mud is not an issue here. I ride all winter and I never had a massive amount of mud under my saddle. And it's easy to clean just point a hose at it.

I never had a crash where my saddle got slammed or broken. Not in 20 years of mountainbiking. And I ride more than all the people I know. Also if you would have an impact on the saddle the loops should even be an advantage because with a massive force the loops should have a small amount of stretch. So you should have a little bit more tolerance to prevent a broken saddle.

In conclusion I would say your concerns are more theoretical they are simply not an issue except you are a saddle tester or like to throw your bike on the saddle.
  • 2 0
 @krka73: The darimo T1 saddle install video with the loops: www.youtube.com/watch?v=2wTxtLP_2OI
  • 1 0
 @justinfoil: Because I'm still surprised anyone would want to deal with that nonsense over the myriad proven conventional designs. But obviously some think it''s a good idea, so by all means, have at it.
  • 1 0
 @juuro: Well, I've seen many saddles, posts & clamps broken in XC racing. Maybe my friends just suck more than average.... so my experience leads me to believe it's a bad solution.

Glad the setup is working for you.
  • 1 0
 That stem is an old kore, don't fool us PB !
  • 4 6
 These days that is not an XC built, the dropper is a much needed weapon for today's race courses. Hell, why not drop the disc brakes and add some v-brakes to get the weight down to 7 kg.
  • 2 0
 Even in the World Cup not everyone uses a dropper post.
  • 1 0
 @dangerholm: you can beat that!
Dangerholm: hold my lemmy shorts
  • 1 0
 I wonder what the rider weight limit is on some of those parts.
  • 1 0
 The limit of the darimo seat post it 90 kg. I think there are no other parts which have an even lower weight limit. So the overall weight limit of the bike should be at 90 kg.
  • 1 0
 @juuro: Disqualifies my 100kg then. Carbon splinter enema is not a goal to have in life.
  • 1 0
 108g handlebars!? Shred gingerly people....
  • 1 1
 I have yet to see that Darimo post on a bike being ridden.
  • 2 0
 Sound I send pictures?
  • 4 0
 a lot of them are probably ridden more than you think, i've probably done 30,000 miles on mine, 30+ xco races, 6 stage races, including cape epic, not had a single problem





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