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Aug 10, 2017 at 21:39
Aug 10, 2017
AgrAde COMMENCALbicycles's article
Jul 21, 2017 at 6:29
Jul 21, 2017
Commencal Supreme SX - 180mm All-Mountain Bike With HPP Suspension System
@BenPea: It's just one way of thinking about it really. I think for normal drivetrain bikes their actual length at 0% sag describes them fine (what geo charts normally show), you don't really need to think too much into it. And high pivot bikes can't really be compared apples-to-apples but knowing how their horizontal length changes through the travel is useful to get an idea of how they behave, particularly from sag to mid-travel.
AgrAde COMMENCALbicycles's article
Jul 21, 2017 at 5:41
Jul 21, 2017
Commencal Supreme SX - 180mm All-Mountain Bike With HPP Suspension System
@faul: Yeah, on the other hand the X-horizon SRAM derailleurs rely on correct chain length to place the upper jockey wheel in the right place to feed the chain on to the cassette, and with lots of chain growth it's going to pull that upper jockey wheel quite far down, away from where it's supposed to be. I'd be interested to know if it affects chain retention. The shimano derailleurs have the upper jockey wheel much closer to the cage pivot so it doesn't move near as much as the chain is pulled tighter, but they have that tighter clutch which wears more and can break. I'd like to know what's best. I guess I'd choose possibly compromised performance over breaking the thing though!
AgrAde COMMENCALbicycles's article
Jul 21, 2017 at 3:57
Jul 21, 2017
Commencal Supreme SX - 180mm All-Mountain Bike With HPP Suspension System
@BenPea: Just found this: http://imgur.com/a/uzDrf The horizontal direction is greatly magnified, but it shows the trance moving less rearward and more forward than the single pivot remedy. The fork lines seem to be on a different scale that isn't shown?
AgrAde COMMENCALbicycles's article
Jul 21, 2017 at 1:30
Jul 21, 2017
Commencal Supreme SX - 180mm All-Mountain Bike With HPP Suspension System
No worries Thom. Nah, Maestro doesn't have a lot of chainstay growth at all. I expect your reign doesn't get a whole lot longer than 440 but it will shorten a lot after sag.
AgrAde COMMENCALbicycles's article
Jul 20, 2017 at 23:31
Jul 20, 2017
Commencal Supreme SX - 180mm All-Mountain Bike With HPP Suspension System
@ThomDawson: I recently drew up the new Intense Tracer, again fairly roughly, from a photo. The geometry isn't accurate, I was more just interested in how their long-linked VPP behaved. Anyway, it'll be fairly representative of any normal drivetrain bike. The chainstays start at 432.0mm, at 30% travel they are at 436.2, are at their longest at ~45% travel at 436.8 and at full travel shorten to 427.3. This is the horizontal chainstay length only - ie if you held the front triangle in place and measured only the horizontal distance between the bb and rear axle. Again, NOT accurate to the actual tracer but reasonably representative of most bikes I'd say.
AgrAde COMMENCALbicycles's article
Jul 20, 2017 at 22:52
Jul 20, 2017
Commencal Supreme SX - 180mm All-Mountain Bike With HPP Suspension System
The suspension is quite supportive at around 100% AS in the lower gears, say bigger than 30t on the cassette. It'll give a trail-bike-like feel at the pedals when you're climbing. The AS drops right off in the higher gears, and it'll pedal like a DH bike when you're up to speed. This does illustrate the issue with trail bikes of this design - pedalling performance varies hugely across the cassette. Though for a long travel freeride-ish bike, you could argue that it's very well suited. I am worried about the size of the idler - it looks fairly small, I'd like to know how many teeth it has. It will rumble a bit.
AgrAde COMMENCALbicycles's article
Jul 20, 2017 at 22:40
Jul 20, 2017
Commencal Supreme SX - 180mm All-Mountain Bike With HPP Suspension System
@Longroadtonowhere: One difference is that an overshoot with your trail bike on crabapple will destroy you, your bike or both. On a bigger bike that overshoot is less likely to end in tears. The other difference is that rough trails do exist, and you need more suspension for rough trails. Freeride isn't just smooth jumps.
AgrAde COMMENCALbicycles's article
Jul 20, 2017 at 22:35
Jul 20, 2017
Commencal Supreme SX - 180mm All-Mountain Bike With HPP Suspension System
Made a rough model of the bike in some cad software. Derailleur will move around less than expected, still way more than a standard drivetrain bike, and I'd recommend a lower guide to anyone buying it.
AgrAde COMMENCALbicycles's article
Jul 20, 2017 at 22:31
Jul 20, 2017
Commencal Supreme SX - 180mm All-Mountain Bike With HPP Suspension System
@ThomDawson: I did a quick and dirty model of the SX in some bike cad software based on the photos, though it'll be fairly accurate for basic measurements. You're looking at a chainstay length of about 445mm at 30% sag.
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