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Six of one, half a dozen of the other
FREE Suspension Setup advice from an expert
- Thread starter roadracerx
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Six of one, half a dozen of the other
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I have written down to aim for 10-15 mm static rear sag. Might be worth the bumping up a rate or 2
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Your "static" or bike sag is off on both ends. Look back through the thread for correct recommendations.
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I have written down that for 22+ V4S should have
- F static sag 25-30 mm
- F rider sag 42
- R static sag 10-15
- R rider sag 30
OK, so if anybody with a corse dynamics tool would be so kind to give me the "ride height reading" of a stock 1199r or 1299s I could backward engineer a tool that uses very close numbers. Currently my 1299s axle length is 534mm, 15/41 gearing, 306 shock length. Is 306mm the factory setting on shock length?
for the shock e2e?
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You can't use shock length to get the swingarm angle correct. Chain tension, shock preload, swingarm pivot and gearing will all affect the end result. You need the tool and the Corse Dynamics tool wasn't very accurate.
yes
Yup, looks like dan kyle racing still makes the tools so Ill have to go snag one of those. Thank you for the info on the corse dynamics tool. Thats the kinda info I am looking for!
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Would shock length be used to correct geometry changes from gearing? I'm +1 on my 959 but still at 106 links
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Thanks, one more question. I'm 200lbs in gear, slow advanced pace. Just put in new nix cartridges with a 10 in 1 fork, 9.5 in the other. And a used ohlins shock from a 959 corse. Came with the stock 85kg spring and a fresh service. Trying to set the sag and I have 18mm of bike sag at this preload. seems like a lot of thread already, but I really have no idea. Is this considered 15mm of preload and how much would be too much?
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@Colmn you need to know the free length of the spring in order to know how much preload is on it which has nothing to do with the threads on the shock body; measure the length of the spring. Also, it is quite hard to adjust shock preload without affecting shock length on the 899/959/1199/1299. I recommend removing the shock to measure properly.
I have a 22 V4S
Weigh 220 with gear
Ride slower end of A group pace, using only 1 gear, so making it all up in braking and cornering.
I changed out the front springs to 10.5
But I still am bottoming out when braking hard at max preload.
Not sure what to do, the stiffer spring and full preload is negatively affecting front end feel, but bottoming out isn't good either when trying to tip in
Weigh 220 with gear
Ride slower end of A group pace, using only 1 gear, so making it all up in braking and cornering.
I changed out the front springs to 10.5
But I still am bottoming out when braking hard at max preload.
Not sure what to do, the stiffer spring and full preload is negatively affecting front end feel, but bottoming out isn't good either when trying to tip in
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Spring is 01092-26/85 the online reference says it's 170mm. Reading through the thread it seems I should be looking for 154 -160 mm installed length. So I should back out the preload all the way, remove the shock, measure, but then whats next sir?
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@Colmn did you remove the spring to measure the free length? The springs are never the exact length they are supposed to be. What I mean is a 1092 spring could be 171 or 169 mm, they are all different.
From you post above it sounds like you have 18 mm of BIKE sag when you are at 15 mm of preload on the 1092 Ohlins spring which has a rate of 85 N/m, is this all correct?
The shock spring is too soft for a 200 lbs rider. Do you have a 90 or 95 available? If so, I would likely start with a 95 N/m spring of the same type: 1092 with 11 mm of installed preload.
Your target should be 30 mm of rider sag and 10-12 mm of bike sag.
From you post above it sounds like you have 18 mm of BIKE sag when you are at 15 mm of preload on the 1092 Ohlins spring which has a rate of 85 N/m, is this all correct?
The shock spring is too soft for a 200 lbs rider. Do you have a 90 or 95 available? If so, I would likely start with a 95 N/m spring of the same type: 1092 with 11 mm of installed preload.
Your target should be 30 mm of rider sag and 10-12 mm of bike sag.
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