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jgutz71

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Discussion starter · #1 ·
Looking for the roll out measurement for my Bronson, tires are High Roller II 2.4
I tried the measurement and came up with 2140mm. Am I close?
 
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Doubt if the number is correct, 26.85 inch diameter? I've seen the 650b Highrollers on a Bronson, it is no shorter than my relatively average diameter 650b Neo-Moto 2.3 which is 27.55 inches diameter and about 2195mm rollout circumference.

Try 2 full wheel cycles, measure and divide by 2. Mark a side knob, start the rollout with that mark at the floor, plum to the axle.
 
OP, are you weighting the wheel? If weight is applied during the rollout, it will measure smaller than an unweighted measurement. It will be hard to compare against rollouts derived from direct diameter measurements, which are normally unweighted.
 
Discussion starter · #6 ·
@ derby: I will try the two complete wheel rotation and see what I get, thanks for the info...
@ lixxfe: no I didn't weight the wheel, I'll give that a try when I do the two complete wheel rotation...
@ JMac47: have a nice day...NOT
 
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I'll try a re-wording: What are you trying to achieve/compare/accomplish by getting this number? Other peoples tire measurements? Or just how to figure out the way to do it?

Thus the "what are you getting at?".
 
Discussion starter · #8 ·
My apologies JMac47 I misunderstood you...I was simply trying to verify my math by comparing what others have measured.
 
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My apologies JMac47 I misunderstood you...I was simply trying to verify my math by comparing what others have measured.
Cool. No worries. I see a lot of the micro-measuring of tyre vs tyre, tyres vs rim widths, bb heights, head angles, stem lengths, flat bar vs risers etc etc etc. :)

Similar to all the gear inch topics with single speeds. Some times just a change in a specific tyre will make the same difference as a tooth on the cog/ring.
 
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