Folding Bikes - Cateye Micro Wireless (MC100W) settings

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ICU Doc
05-11-06, 11:34 PM
For those of you who ride 20 x 1 1/8" (451) tires and use the MC100, what setting do you use for the computer in order to correctly calibrate distances, mileage, speed, etc? I noticed on the instruction sheet a setting of 1515 for 20 x 1.75 tires and 1615 for 20 x 1 3/8 tires, but nothing for 20 x 1 1/8 tires. Is it a linear extrapolation or is there a simple formula to use for deciding on the setting?

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05-12-06, 12:25 AM
I had the same problem with my folding bike.

I used linear extrapolation and it seems to be pretty ok.

I got like 42.68 miles for the 5-boro bike ride.
trentschler
05-13-06, 05:59 PM
For those of you who ride 20 x 1 1/8" (451) tires and use the MC100, what setting do you use for the computer in order to correctly calibrate distances, mileage, speed, etc? I noticed on the instruction sheet a setting of 1515 for 20 x 1.75 tires and 1615 for 20 x 1 3/8 tires, but nothing for 20 x 1 1/8 tires. Is it a linear extrapolation or is there a simple formula to use for deciding on the setting?


I use 1587 for Schwalbe Stelvios in 451 size. I got this figure with the rollout method - sitting on my bike and rolling across my dining room floor! It should be pretty close - within 5 mm - of the actual circumference.