Capcha Posted March 12, 2011 Share Can someone please give me the diameter in mm of a regular Alex rim for MTB?? Link to comment Share on other sites More sharing options...
Capricorn Posted March 12, 2011 Share which diameter do you want? inside diameter, outer diameter? off the Alex rim i have here, inside diameter is approximately 540mm Link to comment Share on other sites More sharing options...
Capcha Posted March 12, 2011 Share Need to set my Polar so it gives me the correct milage speed etc Link to comment Share on other sites More sharing options...
Ikaros Posted March 12, 2011 Share Nuthin' to do with the rim diameter..............its the outer measurement of the tyre! Easy to measure radius or circumference. Link to comment Share on other sites More sharing options...
Ikaros Posted March 12, 2011 Share Mine set at 2085......... you might have to reduce slightly as I'm running 2.2 GEAX which are pretty big and fat ! Check even ere tyre pressure is going to make a difference ! Link to comment Share on other sites More sharing options...
Capcha Posted March 12, 2011 Share Mine set at 2085......... you might have to reduce slightly as I'm running 2.2 GEAX which are pretty big and fat ! Check even ere tyre pressure is going to make a difference !Nice one. Im running Maxxis 2.1 so very simmiler. Thanx Link to comment Share on other sites More sharing options...
Tuxstir Posted March 12, 2011 Share your tire has a marking as such (559 - 52)thats your bead diameter - tire height bead dia + ( 2 x tire height) = tire outside diameter. (O.D)O.D x 3.142(pi)= Circumferenceeasy .. Link to comment Share on other sites More sharing options...
Ikaros Posted March 12, 2011 Share Mark tyre and position on ground...push bike till wheel goes through one full revolution and mark ground where mark on tyre reaches the ground again. Measure the distance between the two marks. Remember to put some weight on the wheel to deform same as riding. Remember even a millimeter is going to make a BIG difference in the final output !! Link to comment Share on other sites More sharing options...
Capcha Posted March 13, 2011 Share Thats the beauty of the internet...get the answer without the work Link to comment Share on other sites More sharing options...
Dubber88 Posted March 13, 2011 Share Gotta love it... Link to comment Share on other sites More sharing options...
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