Bicycle Mechanics - deflating rear tire

is it normal that one's rear tire would deflate after during a ride?

If it is normal how much is normal? It seems I hardly need to pump up the front but I'm constantly inflating the rear tire.

ed

You have a leak, you need to blow the $4 for a new tube.

I pump my tires up every 2nd day. They are usually down 10psi at that time (from 120 psi). If you are losing more than than that its time to find the cause and patch or replace.

Hi ed gavin,

The worst slow leaks I have ever had were caused by running over pieces of electrical wiring. I have learned to advoid them more than glass. The tiny wire pieces will work into your tire and cause a very slow leak.

Anyway you should as posted not really lose more than 10 lbs or so a day . Be sure than when you replace a tube you take a ball of cotton and go very slowly around the inside of your tire. The cotton will catch on the slightest thing. I always carry a ball of cotton or 2 in my patch kit.

Ride Safe...Dudley

Originally posted by ed gavin
is it normal that one's rear tire would deflate after during a ride?

If it is normal how much is normal? It seems I hardly need to pump up the front but I'm constantly inflating the rear tire.

ed

You didn't say how often and how much. Tubes will always lose air over time but you should not have to pump it every day. You probably have a slow leak and need to patch or replace the tube. If the valve is leaking, throw the tube away and try another brand. Also, if you are using an ultra lightweight or latex tube then it will tend to leak faster as will a smaller tube but should still only require periodic refilling.

yes, all of the baove have a good reason, , You need a new tire tube, if you can't find the cause of the leak

Totally agree, you are better off blowing $4.00, (in fact, Supergo has road tubes on sale for $0.99 every once in a while) on a tube than wasting time and energy. Also, get a set of SpinSkin duros, you won't have any more flats!!!

http://www.rlaenterprises.com/cycling/spinskins/index.html

I have read that majority of weight is situated over the rear tire. Would that be why the rear tire loses pressure more than the front?