Bike Check: Amaury Pierron's Commencal Supreme DH 29 - Mont-Sainte-Anne DH World Champs 2019

Aug 30, 2019
by Daniel Sapp  

2018 was a stand out year for Frenchman Amaury Pierron. Taking the overall World Cup title and riding consistently at the top of his game, there was little debate that he was a contender for the title of World Champion, however, after a long season on top coupled with some sickness, the rainbow stripes evaded him.

This year, a similar stage is set. Pierron has once again been consistently riding at the top and the French have taken six of the last seven WC wins. With three wins and not a single finish outside the top-10 this season himself, he's sitting in second place for the WC overall with just two races left... this weekend's World Championships and then finals.

After missing the coveted jersey last year, there's no doubt that Pierron is hungry for the win this weekend and he is no doubt a favorite to take the top step.

Rider Name // Amaury Pierron
Age: 23
Height: 1.8m
Weight: 81kg
Hometown: Brioude, France
Instagram: @amaurypierron4

Pierron has been on the same bike for several years but each season, things have changed a bit. He's still rolling with 29" wheels front and back, steering clear of the mixed wheel size we're seeing some racers running, for the time being.

Commencal Supreme DH 29

Frame: Commencal Supreme DH 29
Shock: RockShox Superdeluxe
Fork: RockShox Boxxer
Wheels: ENVE M9
Tires: Schwalbe Magic Mary, Ultra Soft. 1.8 bar - front, 1.9 - back
Inserts: None
Drivetrain: SRAM XO
Brakes: SRAM Code RSC
Cockpit: ENVE M9 handlebar, 800mm; Spank 40mm stem
Size: Large

This season, Pierron has gone from aluminum handlebars and wheels to carbon parts from ENVE. The set up took a bit to get used to at first due to the increased stiffness and he's running somewhat softer suspension settings to help the bike feel similar to his ride last season. He doesn't know what his exact suspension settings are but he runs things "balanced front to back."

The bike has had a new rear end on it since Fort William. The change makes the back of the bike feel stiffer, according to Pierron, and he feels that the energy transfer is better now, especially when pushing the bike into rough sections of the track.

SRAM's XO DH drivetrain rolling up and over the idler pulley on the Supreme DH.

Custom anodized HT pedals.

The Code RSC levers have a good amount of angle to them. A Chris King headset holds things in place.

No adapters needed to step up to the large rotor size here.

ENVE's M9 DH wheels are shrouded in Schwalbe's Magic Mary tires.

ENVE handlebars, a Spank stem, and custom anodized bolts throughout.

Suspension duties out back are managed by a RockShox Super Deluxe shock. Pierron doesn't keep his settings memorized but you can bet that his mechanic knows exactly how many clicks and volume spacers there are.

Regions in Article
Mont-Sainte-Anne DH Park


  • 111 7
 If you don't have oil slick something on your bike this year you ain't shit.
  • 142 4
 does oil on my brake rotors count too?
  • 42 24
 And if your frame has oil slick idler pulley, you trump all the Enve kitted Yetis with Push Eleven Six shocks and AXS drivetrain. Even if it weighs as much as 2001 Stinky, that is more than a dentist chair. points lost for non near-horizontal brake levers though...
  • 49 22
 Love the new Up/Down vote summary!!! ---->
  • 4 1
 Seems this year it's all about printed/textured/marble-effect type paint. I'm actually curious how some of that is achieved; decals? Or some fancy-ass direct printing setup?
  • 9 31
flag kookseverywhere (Aug 30, 2019 at 8:45) (Below Threshold)
 @High-Life: I actually hate it
  • 1 1
 @Drew-O: this one looks like decals. Reese Wilson's Trek was probably done like this.
  • 1 0
 That's not oil.
  • 6 2
 @jorgeposada: indeed, that’s blood of the opressed. Triggered lives matter
  • 2 1
 Ok what oil slick bleed port bolt. That's pro!! Where the hell do you get one of those
  • 4 1
 His brake lever angle is not even french.
  • 2 1
 Oil slick is the new gold
  • 3 4
 @High-Life: as do I, but I'm flabbergasted at some of the comments that have neg props. really some ppl out here just neg propping everything haha, f*ck em eh?
  • 1 0
 Your bike should look like bp
  • 23 2
 It’s weird when I got some carbon wheels I changed all my suspension settings to make the bike feel more like my alu wheels. Sold the carbon ones in the end....
  • 3 0
 Same here.
  • 4 2
 I rode carbon wheels on dh bike straight after riding alu wheels on enduro bike, and every 100m I wanted to stop to check whether I flatted or not. And Dh bike had moar air installed... boing! Bang! Bang! Boing! Dong!
  • 23 1
 ***googles to see what 1.8 bar means***

I am pleased to report that 1.8 bar = 26 psi
  • 2 0
 I figured in Canada you would use bar not psi to measure pressure.
  • 33 0
 Us canadians have a very intricate mix of imperial and metric system, measuring our pool temperature in F but exterior temperature in C, human height in Ft, construction lenghts in inches, road length in Km and body weight in pounds.

60% of the time it all makes sense
  • 1 0
 @guylovesbike: Damn, that's tricky. It even caused a plane to crash I think, when metric dude asked for X liters of gas, and imperial dude filled the plane with X gallons...
  • 5 0
 @Will-narayan: The plane became too heavy?
  • 1 0
 @Will-narayan: NASA did that landing something on the moon. What they thought was feet per second was actually meters per second. $100M gone. Whoops.
  • 3 0
 @guylovesbike: haha thats like us in the uk

We measure our fuel in litres and our distance in miles and our fuel efficiency in miles per gallon

Our land is in acres and floor space for commercial buildings is square feet but if its residential its square meters

Our food is in grams and kilos and people measure their weight in stones and pounds and our body height in feet but our beds are in meters ????
  • 2 0
 @MTB-Colada: Wait, now that you mention it, maybe the contrary then :p I was writing from memory but in fact it didn't crash (or "barely"). It's somehow famous to have a nickname, the "Gimli Glider".
  • 1 0
 @guylovesbike: that is a perfect summary
  • 8 0
 Are those brakes at a certified French angle? They don't look flat enough, or maybe he's missing the 3rd ball
  • 28 24
 Dislikes enabled so pinkbikers can let you know how much they disagree with anything that's ever said
  • 8 9
 So good!!!!!!
  • 11 8
 Looks like this would have increased anti squat when compared to the production model, is that what he refers to when he talks about improved energy transfer?
  • 9 8
 Why the downvotes peoples? Is what I have written upsetting somehow? If you don't agree feel free to say why rather than just flick your poop and run.
  • 2 0
 I think he was referring to the stiffness of the rear triangle not the anti squat
  • 14 0
 Gets 5 downvotes and cries poop-flicking. Waki gets 700 and keeps poop-talking.
  • 4 5
 @High-Life: Waki is a giant shit flinging dart board, what do you expect.

@SonofBovril - Imagine so, but what about the anti squatz?
  • 1 3
 The anti-squat would only change if they moved the pivot point. That seems doubtful as it would require a new front triangle as well. The whole point of a high pivot/idler design is to allow the rear axle path benefits of the high pivot without negatively affecting chain growth which is often related to the amount of anti-squat.

Unless you are basing your question on something I'm not seeing. Why do you think this rear end woudl change AS ? They don't really say what changed about the rear end except power transfer is better. I suspect the pivots did not change or anything like that, its just thicker aluminum or otherwise stiffening up the rear sectoin.
  • 4 2
 @preston67: Huh? They have changed the idler position, it’s no longer concentric with the pivot and therefore anti squat will have changed, in the same way that changing chainring size will change anti squat - the idler now also looks to be swingarm mounted.

I’m not sure you have a good grasp of anti squat?
  • 2 0
 AFAIK, the whole rear triangle changed. It's burlier than the production model of the one that the other commencal teams are using (Estaque, Frixtalon, etc) so I guess that's what he's talking about.
They've been playing with the idler position pretty much since the beginning of the bike, or just after the couple of first few races.
  • 6 2
 @justanotherusername: yes I genuinely despise folks who whine on getting negprops. or worse, they write: “negprop me all you want”. So, let the negprops commence
  • 1 0
 I dont think the idler ever rotated concentically with the main pivot. It was always slightly below, as it is on the new design. Whether that position has changed slightly I couldnt say. The older swingarm was a different shape, running in a straight line from main pivot to rr axle. The new one kinks up an inch or two first, so the idler pulley looks more exposed. I think they are in at least roughly the same position compared to the main pivot though.
  • 1 1
 @justanotherusername: My presumption was that the pivot and idler did not change, I'm not an expert on the configuration of the Comencal frame. If the pivot or idler position has been changed then it would affect AS.
  • 1 0
 @preston67: "The anti-squat would only change if they moved the pivot point" - Your not only not an expert on Commencal frames, you are also not an expert on anti squat.
  • 3 0
 @gabriel-mission9: You are right the old idler wasn't concentric but the chain did exit almost in-line with the top of the pivot, this one does look a fair bit lower and seems to have an adjustable location too, probably for fine-tuning A/S which could be useful depending upon the type of course, if the rider uses flats / clips etc etc
  • 1 0
 @justanotherusername: Good catch

I have a commencal high pivot and yes there were two changes on the team bikes. The current rear triangle can be a bit flexy as most of the work is being done by the upper tubes while the lower (chainstay) is leveraging the suspension. The new design does a better job spreading the lateral force out across the entire triangle and this improvement has been mentioned by team riders.

Moving the idler up,down & back and forth changes anti-squat and when/how that AS occurs. Moving the idler below the pivot increases AS as it's pulling the triangle down under pedaling power. Too much and it'll bob from chain growth. Go above the idler and it'll pull the rear suspension up under power.
  • 1 0
 @justanotherusername: Sounds like you're an expert on being a dickhead
  • 1 0
 @preston67: top of the class sweetiepie.
  • 4 0
 The bikes not the only thing full of Enve!! Love it
  • 1 0
 Any idea why he is the only guy (that I can remember from all the bike checks) that runs that different rear triangle? Says here it's moar stiff, but wouldn't that also be an advantage for all the other Commencal guys?
  • 1 0
 All of the commencal guys are running the new rear triangle. Pompon however is not and neither are the 100% guys
  • 1 0
 @SonofBovril: Well the 2020 model year was announced not too long ago and it's got the old rear triangle. Weird.
  • 1 0
 Sorry Matt, I read is it possible, and decided to give it a try on your comment...I now see you write will it be possible and now you are stuck with my stupidity downvote that I can't change.
  • 4 0
 And then I didn't even reply to the right comment...the day is off the a great start, thankfully its Friday.
  • 1 0
 on the surface its just another data point. however, research shows that by showing both upvotes & downvotes, people consider their comments for longer before posting. Beer
  • 4 0
 Wait.. Amaury is 180 cm? Thought he was taller.
  • 3 0
 That’s a beast of a bike for sure
  • 2 0
 The welding on the top/head tube is the thing I like most on this bike. Work of art
  • 2 0
 I'll never get over seeing carbon wheels on a commencal...
  • 2 0
 Am i the only one surprised his chain stay on?
  • 1 0
 Extra points for the modified chain device for adjusting idler and what’s the silver squares on the linkage??? Anyone??
  • 2 0
 Wow. Just wow.
  • 1 0
 Interesting and reassuring to see a super deluxe on a DH bike.
  • 2 0
 There is a Super deluxe DH for 2020.
  • 1 0
 but probably not available aftermarket
  • 2 4
 @samdeatley: yeah imagine what they must have done to it’s bollocks to make it feel better than the extravagant floor pump it is in the stock version. Like the vivid air. Jesus.
  • 2 0
 Tire width?
  • 2 0
 I assume they're the 29x2.35
  • 3 2
 Nothing about them stupid stick on things he uses...
  • 1 1
 Well they are stupid but since they are so stupid and non-effective they don't slow him down. Stupid for those who can believe in anything and buy them, but good for the economy I guess so nothing wrong ha ha. At least these are only stickers, not some stupid drug, religion or sect that harm people's lifes.
  • 1 0
 No lower chain guide on this generation of rear end. That's a big deal.
  • 1 0
 Looks like some strain gauges on the linkage maybe? Or maybe... duct tape?
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