Doodlefadd
Member
Hi all,
Long post but,
I've got a few noob question on how do you exactly measure sag. I've been swimming thru the Internet and forum and through too many mechanics locally, to be darn confused now.
And the different terms used depending on region globally, just didn't help.
My riding configurations (if it value-adds the question, I'll just list it)
-2015 non-Es gen 2 s10
-always with pannier, top case, and tank bag.
-front forks stock
-rear shocks ohlins ya013
-don't off road a single bit(wished I could tho, just no place locally to do so, legally)
Measurement enquiries is for solo rider.
For this enquiry, im not gonna use tech terms to avoid confusion to myself and the respondent.
So,
As far as I've learnt, these are the 2 ways to measure proper sag.
1)
- search for the 'free length' of the fork/shocks online/manual and take 30% of that number (a)
-bike on mainstand, wheels off the ground, bike naked (without any boxes/bags), measure. (b)
-bike on ground, rider on, boxes/bags on, measure. (c)
-the difference ( b minus c = a) should be the 30% figure
2)
- bike on mainstand naked, wheels off, measure. (f1/r1)
- bike on ground naked, measure. (f2/R2)
- bike on ground, rider/bags/panniers on, measure (f3/R3)
- formula : R1- [(R2+R3)/2]) = 30-40mm for road use.
My enquiries:
-why is there different ways of calculating the same thing? Is there a preference, or one better than the other?
-is it true that, stock forks free length is 190mm,and ohlins ya013 is 220mm as per manuals? (want to confirm the base value to x 30% from)
-I was told by a mechanic, to loosen all compression and rebound Settings prior to measuring Sag to avoid stiction. I've never seen this advise anywhere else, but when I do measure when both dampening is max loose vs max hard, there is a difference in final value. What should I do exactly?
-also told by another mech that 30mm difference is for road bike. Us adventure bikes have longer suspension travel hence 40mm is the ideal difference to measure for. True?
Suspension gurus alike, I humble request this post be seen, and corrected where wrong.
Thanks for reading too!
Long post but,
I've got a few noob question on how do you exactly measure sag. I've been swimming thru the Internet and forum and through too many mechanics locally, to be darn confused now.
And the different terms used depending on region globally, just didn't help.
My riding configurations (if it value-adds the question, I'll just list it)
-2015 non-Es gen 2 s10
-always with pannier, top case, and tank bag.
-front forks stock
-rear shocks ohlins ya013
-don't off road a single bit(wished I could tho, just no place locally to do so, legally)
Measurement enquiries is for solo rider.
For this enquiry, im not gonna use tech terms to avoid confusion to myself and the respondent.
So,
As far as I've learnt, these are the 2 ways to measure proper sag.
1)
- search for the 'free length' of the fork/shocks online/manual and take 30% of that number (a)
-bike on mainstand, wheels off the ground, bike naked (without any boxes/bags), measure. (b)
-bike on ground, rider on, boxes/bags on, measure. (c)
-the difference ( b minus c = a) should be the 30% figure
2)
- bike on mainstand naked, wheels off, measure. (f1/r1)
- bike on ground naked, measure. (f2/R2)
- bike on ground, rider/bags/panniers on, measure (f3/R3)
- formula : R1- [(R2+R3)/2]) = 30-40mm for road use.
My enquiries:
-why is there different ways of calculating the same thing? Is there a preference, or one better than the other?
-is it true that, stock forks free length is 190mm,and ohlins ya013 is 220mm as per manuals? (want to confirm the base value to x 30% from)
-I was told by a mechanic, to loosen all compression and rebound Settings prior to measuring Sag to avoid stiction. I've never seen this advise anywhere else, but when I do measure when both dampening is max loose vs max hard, there is a difference in final value. What should I do exactly?
-also told by another mech that 30mm difference is for road bike. Us adventure bikes have longer suspension travel hence 40mm is the ideal difference to measure for. True?
Suspension gurus alike, I humble request this post be seen, and corrected where wrong.
Thanks for reading too!