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TheSuspensionLabNZ Liked a reply to forum topic Suspension Component Technology/Functionality Discussion
9/4/2026 5:41am
"You will always have pressure buildup before the preloaded shims open up, and on top of that, in my opinion, digressive rebound tunes are just downright scary on jumps. (Would apply for the R85 rebound tune on the D1.)" The R85 is the most progressive rebound tune you will see in a mainstream damper. Yes it is preloaded with a ring shim but that doesn't automatically mean its digressive. Most of the preloaded rebound stack Rockshox have made are so stiff they don't open, as you mentioned - which makes them progressive. They have always used dished pistons or ring...
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Dougal - SC Liked a reply to forum topic Suspension Component Technology/Functionality Discussion
9/4/2026 5:40am
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This forum topic has 668 replies.
Dougal - SC Liked a reply to forum topic Suspension Component Technology/Functionality Discussion
9/4/2026 5:39am
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TEAMROBOT Liked a reply to forum topic Suspension Component Technology/Functionality Discussion
9/4/2026 5:38am
This is all great info, and thanks to everyone who answered my question. We're really spoiled here in the Vital forums.
This forum topic has 668 replies.
TheSuspensionLabNZ Liked a reply to forum topic Suspension Component Technology/Functionality Discussion
9/4/2026 5:38am
Oh and the data card at the back of the machine - Typical peak speeds are about 6-8m/s on downhill bike forks, and shocks will be up to around 2.5-3m/s. Most dampers "should" be fairly linear up to those max speeds - some aren't by design, but its rare for the ports to "choke" and start generating excessively high rates at those speeds (despite what some people think). It's more likely that high acceleration causes issues (so very high frequency but relatively low speed) which is why the linear actuator dynos exist.
This forum topic has 668 replies.
TheSuspensionLabNZ Liked a reply to forum topic Suspension Component Technology/Functionality Discussion
9/4/2026 5:37am
The machine is basically a motor that turns a shaft, which is turned in to linear up and down motion. The software runs the machine faster and faster, and measures how much force the damper is producing at every point and speed in the stroke. My machine is a CTW "rotary" type dyno with 2 HP and one of the more basic, lower power machines on the market (I think about $15,000 USD today). CTW was born out of a company called Roehrig who pioneered workshop damper testing in the early 90's - many of the older racecar and motorcycle...
This forum topic has 668 replies.
Dougal - SC Liked a reply to forum topic Suspension Component Technology/Functionality Discussion
8/31/2026 8:22pm
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Dougal - SC Liked a reply to forum topic Nerding out on Brakes shall we? Not another tech deraliment
8/31/2026 2:36am
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mfoga Liked a reply to forum topic 2026 WORLD CHAMPS - Val di Sole
8/31/2026 2:35am
Was easy to watch from Japan on Youtube.
This forum topic has 246 replies.
lawn dart Liked a reply to forum topic 2026 WORLD CHAMPS - Val di Sole
8/31/2026 2:35am
Wow, that looked like a great race to watch. Thanks UCI, for paywalling it--ya suck! Top four men within 1.5 second, all under 22 years old. Jonty coming up next year. The sport is NOT slowing down.
This forum topic has 246 replies.
mfoga Liked a reply to forum topic 2026 WORLD CHAMPS - Val di Sole
8/31/2026 2:33am
I was like so Max 😂😂
This forum topic has 246 replies.
Red Number 3 Liked a reply to forum topic 2026 WORLD CHAMPS - Val di Sole
8/31/2026 2:32am
Let's hear a few comments from our 2 new Junior World Champs.
This forum topic has 246 replies.
Dougal - SC Liked a reply to forum topic Suspension Component Technology/Functionality Discussion
8/30/2026 4:09pm
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This forum topic has 668 replies.
Dougal - SC Liked a reply to forum topic Suspension Component Technology/Functionality Discussion
8/30/2026 4:09pm
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Oldngrey Liked a reply to forum topic Suspension Component Technology/Functionality Discussion
8/30/2026 1:51pm
"it appears that DServy was banned from MTBR following some controversial or unkind posts. [ 1 ]" The plot thickens lol, havent seen anything dickish from Dougal here, just helpful advice (dont know the past).
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Friedrich Liked a reply to forum topic Suspension Component Technology/Functionality Discussion
8/30/2026 1:50pm
I hate to break it to you, but both can be true. There can both be utter fanboys of anything (big suspension, tuners, products, what have you) and designs that are objectively really poor. Designs where you have to wonder how they passed any testing. Before getting into such issues, suspension setups of less experienced riders tend to have a lot of room for improvement. I think that's due to mostly two reasons: - A heap of "tutorials" are put out by people that are at least bad at explaining and maybe even bad at understanding the concepts behind suspension...
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Friedrich Liked a reply to forum topic Suspension Component Technology/Functionality Discussion
8/29/2026 6:59am
Oh it definitely is the same Dougal. You and I may be disagreeing about the "unkind" bit though.
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Friedrich Liked a reply to forum topic Suspension Component Technology/Functionality Discussion
8/28/2026 6:29pm
That certainly is an interesting start into a post about tone policing. Out of curiosity, did you for example bother checking the Fox part list? The only listed rebound tune for Grip X is called RF (Rebound firm). Like, it's not even a secret. You do have a point here or there of course, but the way you posted is not the way you'd want the interaction coming your way I'm sure.
This forum topic has 668 replies.
sspomer Liked a reply to forum topic Tire chat (nerds only)
8/28/2026 6:27pm
DH tire torture from world champs today. the double-bouncing is pretty nuts. (instagram only for now, sorry)
This forum topic has 2031 replies.