Electronics, Lighting, & Gadgets - Post your wheel/tire info and computer factor

I wonder how interesting it would be for us to post our wheel/tire info along with the computer factor we use.

I'll go first:

27x1" using 2136
700x28c using 2136

According to my rollouts I should be lowering these numbers, (two different numbers even though the charts say these two should use the same figure). Lowering my numbers unfortunately will bring down my speed readings even more.

Anyway - what are you folks using?

700x23c 2105

700x23C : 2.080

Sorry to break it to you, but roll outs are more accurate than charts. Charts are an approximation and are offered only to simplify the setup.

yes, I know. It's crummy though cuz I thought my average and max speeds were one thing but alas they are quite different now. my rollout gives me numbers closer to yours. I think one was 2060. quite different than 2136! :mad:

guess I'm just gonna have to pedal faster, huh?:notamused:

guess I'm just gonna have to pedal faster, huh?:notamused:

No way! If you have a wireless computer, just get a second sensor and install it on the wheel.

I think the most accurate way to calibrate your computer is to ride a known distance (several miles/kilometers) and then adjust your computer to match that distance. For example, if I ride 5.00 miles on a relatively straight highway with mile markers and my computer says I rode 5.12 miles, then I'll adjust my wheel size by multiplying it by 5.00/5.12.

please folks ... post your own setting info. gtragitt (http://www.bikeforums.net/member.php?u=174247)& Pig_Chaser (http://www.bikeforums.net/member.php?u=101711)did it, so can you! :-) (http://www.bikeforums.net/member.php?u=101711)

Post your Post your rim diameter while you're at it. A wider rim will flatten the tire and decrease its ERD.

rim width then, not diameter

26x1.6 (42-559) Schwalbe Marathon Supreme tires on Velocity Synergy rims = 2030 mm

Michelin Trans world City, 700 x 28 ,2127
We have a hand measured course to check with at 1 mile, 5 miles, and 10 miles.

Specialized Mondo 700 x 23c, Mavic MA2, 2090.

To do this right all this info is needed:
-Tire size
-Sensor location (front or back)
-Tire brand/model
-psi
-Your total weight (bike and equipped rider)
-Rim size

700 x 33.3 and 26x1.75. No computer to look at so I just enjoy the ride and keep an empty space on my bars for a computer that I say I'll buy but most likely never will.

To do this right all this info is needed:
-Tire size
-Sensor location (front or back)
-Tire brand/model
-psi
-Your total weight (bike and equipped rider)
-Rim size

Why?