rbent Forum
https://rbentonline.org/YaBB.pl
General Category >> Technical >> Trike Tires
https://rbentonline.org/YaBB.pl?num=1278262923
Message started by richardr on Jul 4th, 2010, 12:02pm

Title: Trike Tires
Post by richardr on Jul 4th, 2010, 12:02pm
I'm looking for a trike tire 20 x 1.75 which has a max pressure of over 85psi for the back of our Greenspeed tandem.    [smiley=chinscratch.gif]

I found the Schwalbe Marathon Plus which has a max pressure of 70psi.  This isn't much higher than the Tioga tires I currently use with a max pressure of 65psi.

Also does anyone have experience with regularly running tire pressures higher than the max?

Title: Re: Trike Tires
Post by Opus the Poet on Jul 5th, 2010, 10:51pm
Supposedly the rating on the sidewall has a safety factor of 1.5, the worst tire in a batch is not supposed to blow off the rim when inflated to 1.5X the sidewall rating, so for a 70 PSI rated tire you can pump it to an actual 105 without worrying that it will blow off the rim. The only problem with that is that rim blowoff is the least likely failure mode from overinflation, but it is the most spectacular. You could take a 70 PSI rated tire to 85 or 90 if conditions warranted that kind of pressure and you didn't actually go slower because the tire wasn't rolling on the road any more but was just bouncing above it. Coast down tests are a good indication of proper inflation because low speed rollout is more affected by rolling resistance changes than by aerodynamics.

Title: Re: Trike Tires
Post by Patti on Jul 6th, 2010, 12:13pm
I have Schwalbe Marathon Racers on my Catrike. My tires are rated to 80psi, although the manufacturer's site says 85.

Title: Re: Trike Tires
Post by mleuck on Jul 12th, 2010, 9:32pm

richardr wrote:
I'm looking for a trike tire 20 x 1.75 which has a max pressure of over 85psi for the back of our Greenspeed tandem.    [smiley=chinscratch.gif]

I found the Schwalbe Marathon Plus which has a max pressure of 70psi.  This isn't much higher than the Tioga tires I currently use with a max pressure of 65psi.

Also does anyone have experience with regularly running tire pressures higher than the max?


Schwalbe Kojaks although they are 1.35, rated at 95 although I always run them at 100

Title: Re: Trike Tires
Post by richardr on Jul 17th, 2010, 9:29pm
I appreciate all the responses I received.  I haven't decided which tire to buy, but your input really helps.
Richard

rbent Forum » Powered by YaBB 2.1!
YaBB © 2000-2005. All Rights Reserved.