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Bike Check: Harriet Burbidge-Smith's Canyon Stitched 720

Jun 17, 2024 at 13:42
by Matt Beer  

The Crankworx Slopestyle series has progressed to include a female category this year and that's led to one of the tour's top competitors, Harriet Burbidge-Smith, building a new whip for the event. She's taken wins in the Speed and Style event onboard a trick-worthy bike before, however, slopestyle calls for something much more specific. A more compact bike with fewer components helps to focus in on the accuracy needed to execute such acrobatic tricks.
Harriet Burbidge-Smith
Age: 27
Hometown: Canberra, Australia
Sponsors: Red Bull Bike, Canyon CLLCTV MTB POC Sports, SRAM, RockShox, Kenda Tires, Go Pro, Title MTB, Industry Nine, Krush Oz

On top of the new event, Harriet, aka "Haz", has a new frame sponsor; Canyon. She's built up the Stitched 720 - a 26" full-suspension frame. It's built around geometry tailored for exclusively for slopestyle. There are no gears and she's only running one brake. The tires and suspension are pumped up to the high pressures the slopestyle courses necessitate, plus there are special touches throughout that separate the Stitched 720 from the rest of her Crankworx fleet.

Harriet Burbidge-Smith
Bike Details:
Frame: Canyon Stitched 720, size small
Fork: RockShox Pike DJ, 100mm
Shock: RockShox Monarch RT
Wheels: 26" Industry Nine DJ305
Tires: Kenda Booster front, 3-sixty rear w/tubes
Inserts: N/A
Brake: SRAM Level Ultimate, 160mm rotor
Bars: Title AH1, 38mm rise
Stem: Title ST1, 35mm length
Grips: Title FORM
Shifting: N/A
Cranks: SRAM X01
Pedals: Title Connect
Saddle: Title JS1
Post: Title AP1
Extras: WRP 3D-printed chain cog guide

Harriet Burbidge-Smith
A RockShox Pike DJ is set to 100mm landing the head tube angle at 69-degrees.

Harriet Burbidge-Smith
The fork and shock are cranked to the maximum pressure and the compression adjusters are nearly closed, giving just enough cushion to take the sting off of a miscalculated landing.
Harriet Burbidge-Smith
A tiny 190mm x 51mm rear shock produces 100mm of rear wheel travel.

Harriet Burbidge-Smith
Harriet explained that there is only enough time to sneak in one crank between jumps and that calls for a tall 32/13-tooth gear ratio.

Harriet Burbidge-Smith
The single-pivot swingarm rotates around the bottom bracket to maintain optimal chain tension as the suspension compresses.

Harriet Burbidge-Smith
A tensioner is built into the drop out and keeps the rear axle from slipping when things go sideways.

Harriet Burbidge-Smith
Mic from Williams Racing Products 3D-printed this custom chain guide.

Harriet Burbidge-Smith
Title MTB covers the majority of the bike, including the contact points.

Harriet Burbidge-Smith
Harriet prefers a 35mm long stem and 38mm rise bar. That's trimmed down to 710mm, which is narrower than she normally runs on her speed and style bike.
Harriet Burbidge-Smith
The brown leather of the wide Title JS1 saddle goes well with the green frame.

Harriet Burbidge-Smith
The Connect pedals are one of Title's newer components.

Harriet Burbidge-Smith
Harriet is on 165mm cranks now, but is hoping to try out 160s in the future.

Harriet Burbidge-Smith
Fast micro-knobby Kenda Booster is pumped to 60 psi up front.
Harriet Burbidge-Smith
The slicker 3-Sixty rear tire is cranked to 65 psi.

Harriet Burbidge-Smith
There's no mistaking the candy colors and aluminum spokes of Industry Nine wheels.

Harriet Burbidge-Smith

Harriet Burbidge-Smith
Growing up racing BMX in Australia, Harriet runs her rear brake on the left. She chooses to run an extra-long brake hose opposed to a gyro system.

Harriet Burbidge-Smith
One brake with a 160mm rotor is all you need for this contest.

Harriet Burbidge-Smith
A personalized top cap always complements a custom bike build.

Author Info:
mattbeer avatar

Member since Mar 16, 2001
390 articles

  • 29 0
  • 4 0
 Am also holding out. Long size pls
  • 10 1
 That WRP guide is pretty slick. My brain wants one on my DJ.
  • 7 0
 That is one beautiful build
  • 5 3
 Chain tensioners keep the axle in place even when things aren't going sideways, just pedalling can slide the axle in horizontal drops.
  • 4 6
 Only if you don’t set it up properly
  • 7 2
 @enduroNZ: you clearly don’t pedal as hard as some of us
  • 1 0
 In the article it is mentioned that she doesn't spin the cranks much so yeah, I can imagine in this case she's more likely to shift the axle through landings than through pedaling. That said, tensioners by themselves aren't strong enough to cope with the chain forces. You really need to tighten the axle nut properly. Not sure whether they still do that, but I recall that DMR at some point (and possibly still) has the dropouts slightly tapered so when you're even less likely to shift the axle as long as the nuts are tightened properly.
  • 1 0
 @vinay: how would tapered horizontal dropouts work this way ? If they were tapered enough to hold the axle (a shallw v shape) then the axle wouldn't be able to move horizontally. Do you have any photos/links of this approach ?
  • 1 0
 @vinay: I see, I took 'dropouts which are slightly tapered' to mean the dropout slot itself, not the orientation of the dropouts to one another. This is clever but wouldn't work for pegs if the peg contact surface is tapered. Probably why we dont see anything like this in BMX.
  • 1 1
 @DGWW: Yeah, BMX bikes have their own way of dealing with their challenges yet at the same time, I wouldn't expect pegs on a modern DMR bike nor on a slopestyle bike (which the article is about). There definitely has been a time when they've experimented with pegs on mountainbikes (and Marzocchi even had a DJ fork which could fit pegs) but it must have been two decades since the scene moved away from that concept.
  • 1 0
 @vinay: Lets be honest with ourselves here, its all really just bmx. Especially when they are riding a skatepark or trails (dirt jumps) with a suspension fork lol
  • 1 0
 @DGWW: To be honest I don't mind really. Mountainbiking was finding its feet, exploring what works and what doesn't. Hitting some dead ends is part of the journey. Anyway, that's not how came to this point in the discussion. Tapered horizontal dropouts would have worked on the bike in the article if chain tensioners would have to be eliminated for some reason. You brought in the BMX hence I introduced the pegs but neither is relevant here.
  • 1 0
 @vinay: we can add pump track races to the list of areas where MTB is still 'finding its feet'
  • 1 1
  • 1 0
 @DGWW: Pumptracks can be ridden (and raced) on nearly anything unpowered on wheels. Inline skates, skateboards, scooters, bikes... Some image-conscious commenters may skimp at inline skates and scooters but I'd rather see people play on these than dissolve in social media on their phones. So yeah, I wouldn't limit pumptracks to a single vehicle as much as I wouldn't limit water to swimming. So yeah, pumptrack riding on mountainbikes as well as BMX bikes is perfectly fine with me.
  • 1 0
 @vinay: Fair point, better to have more people on bikes than fewer, to that end, I think the pump track contests which are restricted to mtb should not be a thing, to your point it should be inclusive. If it were , people will use the right tool for the job (not suspension)
  • 1 0
 @DGWW: the world championship of pump track is literally bmx or mtb in the same class.
  • 1 0
 @angryWaki: I once snapped a hollow tech crank on the drive side riding the old ghost road (80km trail) on a single speed..
  • 1 0
 @14pslope: as it should be, but there are "literally" other contests which only allow certain wheel sizes & every rider was riding front suspension ( crankworks maybe ? )
  • 1 0
 @DGWW: The thing with Crankworx is that out of all disciplines there, RockShox has chosen to be the title sponsor for the pump track race. Maybe with the sole intention that every single Crankworx discipline is going to be ridden with at least a suspension fork.
  • 1 0
 @vinay suspension is not a requirement

3.11 Mandatory Athlete Equipment
• Full-face helmet (Any certified 1 or 2-piece helmet)
• Pro Categories: 26” wheel minimum with 2” tire width minimum
• CWNEXT Categories: 24" wheel minimum with 2” tire width minimum
• Chainless format (Safety Recommendation: Remove chain ring)
  • 2 2
 I admit not having any knowledge of slopestyle whatsoever, but can anyone explain why a beautiful, otherwise modern, bike like this still uses open horizontal dropouts instead of a through-axle?
I always found properly centering the rear wheel and tensioning the chain this way a royal PITA.
  • 12 0
 So you can tension the chain correctly and have slight adjustment on chainstay length. it's not a problem once you've done it a few times. Sliding dropouts could work but that just adds other areas of failure.
  • 8 0
 cause single speed
  • 2 0
 The Trek Ticket has a through axle setup with tensioners.
  • 6 5
 @dannyboybiker: and it’s lame af tbh. Who wants to have to essentially run a derailer to be able to be SS?
  • 4 1
 @angryWaki: You don't have to run a derailleur. It's a normal horizontal dropout with a chain tensioner, it's just drilled and spaced for 142mm x 12mm through axle.
  • 3 1
 A through axle has more (structural) advantages than would make sense even if you don't run a derailleur.
  • 1 0
 @vinay: I'm not sure a through axle has a structural advantage over a solid axle with nuts on the ends. Would an aluminum through axle really be more structurally sound than a 14mm steel solid axle with nuts ?
  • 1 0
 @DGWW: No, but that's not what it is about. A through axle can serve as a structural member of the frame, which is particularly relevant for bikes with a rear suspension linkage (as the rear triangle then consists of several moving parts). An axle with nuts doesn't do that.
  • 2 0
 @vinay: I think if an axle with nuts didn't create a structural member , then we wouldn't see any bolted trusses on bridges.
A through axle is threaded on one end, but not on the other, so in my mind it would be even less structurally integral than something which is being pinched at both sides (solid axle is pinching the dropout on each side vs a TA which is compressing the assembly from the outside only.)

TA sandwich : TA head - dropout - axle around TA - dropout - threaded head (UDH) vs
Solid Axle Sandwich: Nut - dropout - Axle flange/cone nuts etc (and this is mirrored on the other side with the solid axle in between, not under compression from the nuts)
  • 2 0
 "A tiny 190mm x 51mm rear shock"

Same length shock that was on my OG Stab Dee Lux!
  • 5 5
 still messed up that canyon doesn't make this available in the US. also that chain guide is useless.
  • 5 2
 I think the Emil bike check on PB from a while ago explains why they use these little rear cog guides.
  • 2 0
 They’re just out of stock atm
  • 6 1
 @dirtyburger: Emil rides a Trek Ticket S with a suspension design that requires a chain tensioner and the chain does change tension on that bike. The Stitched 720 pivots around the BB so there is zero chance of the chain skipping.
  • 2 1
 such a Cumberbatchable name
  • 1 2
 We have that bike and it is identical
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