700 x 21c tyre size
MrSquishy
Posts: 277
in General Chat
I'm in the process of calibrating my new computer and the tyre size guide in the accompanying booklet doesn't have my tyres in (Specialized Mondo Pro 700 x 21c). I've searched online and found nothing of any help on Specialized or Polar's websites or on various other forums I've searched.
I understand the most accurate way is to sit on your bike and measure the distance of a full wheel rotation, but I'm not going to be able to do this before the weekend so if anyone can help in the short term until I'm reunited with my bike that would be appreciated.
I understand the most accurate way is to sit on your bike and measure the distance of a full wheel rotation, but I'm not going to be able to do this before the weekend so if anyone can help in the short term until I'm reunited with my bike that would be appreciated.
0
Comments
The best way only takes 2 minutes and involves the following:
Line up the wheel so the valve is at the bottom of the wheel and adjacent to a known point on the ground (mark 1).
Walk the bike (or stand alone wheel) forward for 1 complete turn (i.e. until the valve is back down towards the ground).
Mark that point on the ground (mark 2)
Get a tape measure and measure the distance between mark 1 and mark 2. I guess this will need to be in cm for the computer but it should be obvious.
That is the number you input to the computer.
DJ
Having done all this, why do I always think that my computer is reading slow? Surely I'm going faster than that?
Is 2100mm close enough to be getting on with?