my training wheels, or the stock bontrager select with bontrager select tires are spec'd at 100psi however i prefer them at 120psi cold. will this lead to a problem down the line? my front tube is a normal el cheapo tube and the rear tube is a michelin ultra-lite with slime liner (800miles and no issues yet...actually loving this combo).

thanks.

my training wheels, or the stock bontrager select with bontrager select tires are spec'd at 100psi however i prefer them at 120psi cold. will this lead to a problem down the line? my front tube is a normal el cheapo tube and the rear tube is a michelin ultra-lite with slime liner (800miles and no issues yet...actually loving this combo).

Unless you are getting pinch flats, there is no rational reason to run at the higher pressure, since it is uncomfortable, accelerates tire wear, reduces cornering traction, and offers no performance advantages. That said, there is no problem with running at the higher pressure. Your inner tube does not care, since it is pressed against the inside of the tire/rim and is supported that way. If you are getting pinch flats at 100 psi, you might want to think about larger tires.

Unless you are getting pinch flats, there is no rational reason to run at the higher pressure, since it is uncomfortable, accelerates tire wear, reduces cornering traction, and offers no performance advantages. That said, there is no problem with running at the higher pressure. Your inner tube does not care, since it is pressed against the inside of the tire/rim and is supported that way. If you are getting pinch flats at 100 psi, you might want to think about larger tires.
He might just like em higher. I can run my wheels at 80psi and not get a flat, but I like mine at around 115 to 120. It's no faster, but I like it.
To the OP; what Kerry said, but if you like the feel of 120 enough... My one worry is that I personally don't go more than 5 over what the tire recommends - my Conti's have a 120 limit, and I would be scared at 130... I wouldnt want to compromise the tire and have it blow out or something similarly miserable.
-estone2

both good points. although i really don't like the tire, i really do not want to run armadillos or gatorskins for trainers. so far the slime liner has worked well.

at 100psi the tire was still 'squishy' at 120psi there's still a little give but feels much better.

we'll see i guess. thx.

both good points. although i really don't like the tire, i really do not want to run armadillos or gatorskins for trainers. so far the slime liner has worked well.

at 100psi the tire was still 'squishy' at 120psi there's still a little give but feels much better.

we'll see i guess. thx.You may want to check your gauge accuracy. A tire at 100psi would not be squishy, unless you are really strong.

I think what Kerry is getting at is that the 'squishy' feeling is not a bad thing.

There's a reason we ride on pneumatic tires and not solid rubber, that squishy feeling is improved ride quality. It means you don't feel every bump in the road.

Silas

You may want to check your gauge accuracy. A tire at 100psi would not be squishy, unless you are really strong.

easy way i can do this? it's a new standard sefras pump

get some Specialized All condition pros. I raced those tires all last year with NO flats and NO issues of any kind. Plus they roll plenty fast enough

get some Specialized All condition pros. I raced those tires all last year with NO flats and NO issues of any kind. Plus they roll plenty fast enough

thx for the advice. i'll definitely look into that.

my training wheels, or the stock bontrager select with bontrager select tires are spec'd at 100psi however i prefer them at 120psi cold. will this lead to a problem down the line? my front tube is a normal el cheapo tube and the rear tube is a michelin ultra-lite with slime liner (800miles and no issues yet...actually loving this combo).

thanks.
What everybody is trying to say nicely is that the higher pressure is SLOWER. Why would you want to go slower (as well as rougher with less traction)? - TF

What everybody is trying to say nicely is that the higher pressure is SLOWER. Why would you want to go slower (as well as rougher with less traction)? - TF

i'm really starting to have less faith in my pump's accuracy. =/

That said, there is no problem with running at the higher pressure. .

How do mfr's determine their "maximum rated pressure?"

Michelin rates proraces at 116psi, but Vredestein (I think) has an ad campaign where they're make a fuss that you can run 145 psi. I can't think of what FOR, but still.

I've also noticed that RIM manufacturers have a max rating, with some 120psi or lower. Should those be followed more stringently?

How do mfr's determine their "maximum rated pressure?"

Michelin rates proraces at 116psi, but Vredestein (I think) has an ad campaign where they're make a fuss that you can run 145 psi. I can't think of what FOR, but still.

I've also noticed that RIM manufacturers have a max rating, with some 120psi or lower. Should those be followed more stringently?

I've read that tire people run their tires up to double the rated pressure, though given the reports of blow offs, I question that a bit. I'm sure that the rim makers put in some safety factors and worry about sidewall wear when they set their limits down. The only rim sidewall failures I've seen have been due to wear, though I would be the first to admit I haven't seen many! I have little doubt that Vredestein's high pressure ratings are driven by the marketing department, as there are SO many riders who immediately equate higher pressure ratings with better/faster.