Bike Check: Cody Kelley's Specialized Stumpjumper Slalom Bike - Sea Otter 2021

Oct 10, 2021
by Trevor Lyden  
Cody Kelley and his Specialized S-Works Stumpjumper custom set up for dual slalom.
Cody Kelley and his Specialized S-Works Stumpjumper custom set up for dual slalom.

Cody Kelley is a usual here at Sea Otter, and this year we caught up with him to take a look at his dual slalom bike. Cody has chosen a Specialized S-Works Stumpjumper that has been crafted to fit this race. A few of the notable changes he and his mechanic Joe made are swapping the stock 29" wheels for a smaller 27.5" set. They've also gone with a 130mm Fox 34 fork. For the drivetrain Cody is running an XTR derailleur with a 10-speed road cassette and 36 tooth chainring up front. The CushCore tire inserts have been removed to help reduce weight and he is running a Maxis DHF up front and Aggressor in the rear.

Fox Float DPS set to 280psi with a few spacers and stiff dampening.
Fox Float DPS set to 280psi with a few spacers and stiff damping.

Roval carbon hoops in 650b wrapped in a Maxxis Aggressor tire. No CushCore is a change from his usual enduro setup.
27.5" Roval carbon hoops wrapped in a Maxxis Aggressor tire. No CushCore is a change from his usual enduro setup.

Maxxis DHF up front.
Maxxis DHF up front.

No dropper post needed for dual slalom.
No dropper post needed for dual slalom.

Cody is running an XTR derailleur with a 10-speed road cassette. Up front is a Shimano 36 tooth ring.
Cody is running an XTR derailleur with a 10-speed road cassette. Up front is a Shimano 36 tooth ring.

Time clip in pedals keep is feel planted and putting the power down.
Time pedals keep his feel planted and putting the power down.

Cody opted for a smaller lighter fork for racing dual slalom. This Fox Factory 34 has been dropped to feature 130mm of travel and he s running around 130psi with nearly maxed out spacers. For dampening he keeps it in the middle setting and calls it good.
Cody opted for a smaller/lighter fork for racing dual slalom. This Fox Factory 34 has been dropped to feature 130mm of travel and he's running around 130psi with nearly maxed out spacers. For damping he keeps it in the middle setting and calls it good.

PNW color matched stem cap and 40mm PNW stem.
PNW color matched stem cap and 40mm PNW stem.

4-Piston XT Brakes clamped onto PNW Components bars cut to 750mm with Ergon grips.
4-piston XT Brakes clamped onto PNW Components bars cut to 750mm with Ergon grips.



63 Comments

  • 79 0
 Love the close up of the valve stem nut.
  • 5 2
 It didn't stop Sik Mik from winning the DS at SOC! ----siiiiic----- Cody was fast AF though - no dis.
  • 29 0
 Why is his valve stem nut so loose. Is it to center the 2g of weight in the middle
  • 17 43
flag FR33DOMdotCOM (Oct 9, 2021 at 17:59) (Below Threshold)
 If the tire is a looser fit on the rim, it might move a little under hard braking and rip the valve out of the tube if you tighten it down. It was common to leave a little play in the valve nut back in the days when the tolerances from rims and tires were varying a lot.
  • 24 5
 @FR33DOMdotCOM: Just no.
  • 11 7
 @FR33DOMdotCOM: yeah definitely not.. I've seem them rip out because too loose and too much movement.
  • 11 11
 @tbubier: nah that’s real. Years of shop time, if the pressure is low the tire will slip on the rim. Tears the valve stem out of the tube. Seen it happen on bikes that have just been sitting and pressure is low or high grip/high torque environments. Like slalom or bmx racing.

I don’t run the lock rings if I have a tube in general. Why’d you leave it on but 10mm from the rim is whack.
  • 6 5
 @FR33DOMdotCOM: I would be surprised if he was running tubes, but not sure the valve would seal if was tubeless without tension on it. It is likely because he is cornering so hard in left hand turns that it is forcing the nut loose.
  • 10 1
 @bainer66: Why would running tubes be odd in slalom racing? Tubeless is great if you want to run low pressure and get more traction. But I don't think that quite counts for slalom. With a tube, at least he doesn't have to worry about burping. The front valve looks different (black) so my guess is that he's running a tube in the rear and tubeless in the front.

But left hand turns forcing the lock nut loose? I can't see how that could happen.
  • 11 0
 @FR33DOMdotCOM: you are dead right sir (or madam). He is clearly running inner tubes in this set up, and what you describe is the exact thing that will happen when running inner tubes. I'd guess the downvoters have never ridden with inner tubes...
  • 2 5
 @vinay:
Sarcasm my friend.
  • 4 0
 @TinuKu: I know, but who cares about the haters and armchair mechanics ... cheers mate!
  • 1 0
 @bainer66: love it!
  • 3 0
 @bainer66: Ah, your complete post (including the bit about tubes) was sarcasm. Sorry mate, I missed that.
  • 19 0
 Frame size should probably be mentioned in a bike check
  • 6 0
 I've raced dual slalom on a trailbike (turner 5-spot) as well as a dedicated slalom racer (2009 Specialized SX supercross).....the SX had a super low bottom bracket, long frame, short travel 100mm suspension front and rear, and felt like it was glued to the course. The trailbike, on the other hand, never felt happy doing it - never would settle into a corner, center of gravity was off (130mm of suspension) and the bottom bracket was a good bit higher (as any good trail bike would be).....

I'd be curious to know if the winners were on slammed trailbikes, or real dual slalom racers?
  • 2 0
 You nailed it. I've experienced/seen the same thing. Perhaps with the rise of DS again Wink ... there could be 2 categories: dual slalom and trail slalom. For the trail hybrids..
  • 2 0
 I still have an 09 SX. One of the best looking bikes I have.
  • 1 1
 I was watching finals yesterday in person and everyone was on modded trail bikes. The sea otter course is just way less manicured than every other dual slalom course thats normally raced. Its super chunky, and every berm is a sand pit. Theres just no way a 100mm bike would get through it with good speed.
  • 4 0
 @manusvelox: They're on modded trail bikes because no one makes DS/4x bikes anymore.
  • 9 0
 You had me at DHF.
  • 4 0
 That's a Ground Keeper stem cap. They've got lots of accessories with cool graphics.
groundkeepercustom.com/collections/topcaps/products/space-cadet-topcap?variant=36459800395935
  • 1 10
flag DoubleCrownAddict (Oct 9, 2021 at 21:27) (Below Threshold)
 Thanks!
  • 7 1
 Running a tube to avoid burping? Gonna get all BMX on those corners!
  • 4 0
 Running so little sag that the lower bb doesn't matter or fancy link to re-balance the geo?
  • 5 1
 Stock link, stiff suspension, and also consider that there really shouldn't be any hard hits in dual slalom.
  • 6 1
 Lowered bb is a positive for slalom - nice low weight distribution for flying through berms. No need to worry about pedal strikes on rocks or roots either
  • 1 0
 Nevermind, seems like specialized actually sell a mullet link for it.
  • 2 1
 Yeah that would be a blast on a pump track or some BMX trails. Basically a big boi BMX at that point. Cassette is interesting... No downhill rigs laying around or is it just that he didn't want to change the derailleur and that cassette works without swapping anything else? Seems like one of those ~7 speeds is all you'd need as long as your front ring is right for your power output.
  • 3 0
 7 speed shimano for dh is just 10 speed road cassette minus 3 sprockets and some spacers and limiting the derailleur. If you don’t have the screw adjustment available you keep the cassette just in case something wonky happens.
  • 3 0
 @DHhack: This is the most fitting username for an answer. Yeah I figure if the derailleur works that way just leave it. Do some derailleurs not have a long enough limit screw setting to properly run dh 7 speeds without popping out of the range? Maybe 12s derailleurs that would be a big ask.
  • 2 0
 @lepigpen: lol yeah some you have to swap in a longer screw. I used to run the Hope dh hub that couldn’t fit all 10 gears so I ran 7 plus the spacers and the Saint 10 speed derailleur limit screw was long enough to work. Looked strange but made for a stronger rear wheel.
  • 3 0
 Looks like the same frame he raced at Ashland enduro but a different build. Very cool to see two different takes on the same bike
  • 3 0
 A pretty good bike check if I do say so myself, a nice break from the usual
  • 1 0
 I'd love to ride this set-up. I had one of the new Stumpjumper's but couldn't get on with the 29" wheels, so sold it after a few weeks, but would jump at the chance to run that frame with 27.5" wheels.
  • 3 0
 Someone get this guy some water
  • 3 0
 What garmin mount is that?
  • 3 0
 I 2nd that, what mount is that?
  • 2 0
 I'll third that
  • 2 0
 Specialized make it for their E-bike head unit... Happens to use a Garmin interface
  • 1 0
 I’ve bought this garmin mount from the shapeways marketplace a couple of times. Best one I’ve used because it’s relatively short. You just need a slightly smaller top cap to fit in there. In my experience, cane creek, spank and the privateer one that came with the bike work.

www.shapeways.com/product/TLC4FEU5N/lazybone-stem-cap-mount-for-garmin-edge
  • 1 0
 @shapethings: thanks but that one won’t work with the Oneup EDC tool.
  • 3 0
 Maxx terra front and is that dual compound rear? Bit surprising…
  • 1 0
 Why?
  • 2 0
 Yeah I thought he might go Maxx Grip in the front. I guess you don't need super sticky tyres for it, fast rolling probably preferable
  • 1 0
 @savmeister: bc they have a more grip and the only drawback (imo) is that they wear down faster and are more expensive. -Being that pros dont need to buy tires and can have what they want i thought it was surprising he chose the lesser rubber. Especially the dual compound.
  • 1 0
 That is one sick setup. Cannot wait to be able to get the mullet link for mine!
  • 2 0
 Nice to see Thomson is still the go-to for rigid seatposts
  • 3 0
 Or is omnipresent in the parts bin of evey house
  • 2 0
 Water bottle full of lead?
  • 2 0
 No dropper post required for Dual Slalom, but a water bottle is?
  • 2 1
 Weird to say cushcore was "removed" since those aren't his normal wheels to begin with.
  • 2 0
 Rotor size?
  • 1 0
 Bruh. 130psi in the fork!?
  • 2 0
 Slalom with bottle?
  • 1 0
 What Garmin mount is that?
  • 1 0
 nice build….still looks like a gate.
  • 1 0
 go Cody!
  • 1 1
 nice bike
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