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Road bike tire pressure?(7 posts)

Road bike tire pressure?jfk
Nov 13, 2002 4:53 PM
Im an expert on what tire pressure to use for my mountainbike, but dont't have a clue as to what tire pressure to use on my new road bike. I weigh 125, have an aluminum frame, and have 700 25c tires. What should I run? Thanks...
re: Road bike tire pressure?laffeaux
Nov 13, 2002 5:23 PM
Depends on the tire, riding conditions, and personal preference.

I'm 170 pounds and ride 23mm Michelin Axial Pros. I pump them to 105 psi for a comfy ride, and closer to 115 when I'm going for speed.

Your tire should have a maximum pressure written on the side walls. Most people go to that pressure if you're looking for the least rolling resistance possible, and just under if you like bump absorption.
A number of factorsKerry
Nov 13, 2002 5:34 PM
but at your weight, 100 psi/7 bar should be fine. You can go higher but you will mostly just get a harsher ride. You can get more comfort by dropping to 90 psi/6 bar. Don't go much below 90. I weigh 50% more than you and ride at 115 psi/8 bar on 23s with good comfort and no pinch flats. Some will claim that higher pressure will be faster, but it mostly "feels" faster due to the harsh ride. When you wear out the 25s (many 1000s of miles at your weight) then switch to 23s. No need for you to be riding the 25s.
On my Tufo's:Alexx
Nov 13, 2002 5:38 PM
I'm 185 lbs, 6'2", riding 700x21 S33 tubulars-I usually run 105 front, 125 rear for training, but will occasionally run 120 front, 145 rear for speed. I once rode my old Conti Sprinters at 160 psig, just to see if that helped. It didn't.
Nov 13, 2002 7:51 PM
At 130 lbs, I run 105 psi in back and 100 in front for 23's, 100 psi rear, 95 psi front for 25's. Results? Fewer flats (yes, it is true!). Much more comfy ride. Better and more predictable cornering.

I used to run high pressure but have learned from more experienced riders on the virtues of moderate pressures.
I've noticed better cornering too!niteschaos
Nov 14, 2002 8:05 AM
when I switched to 25s from 23 in the exact same tire series (Conti Sport 1000) the cornering was noticably improved. I can't give you hard facts on skidpad ratings or anything, but I trust the tires more cause they seem to squirm less under the bike.

[note: I am 6'2" and 195lbs]
re: Road bike tire pressure?DINOSAUR
Nov 14, 2002 9:55 AM
Too many factors to consider for a psi. Depends on your weight, wheels, tires, roads, frame material etc. I found one thing that really helped the ride on my Klein was to lower the psi from 120 to 115. I'm a big guy at 200 and I always thought that a higher psi was the way to go. A higher psi will make the ride more jarring and you tires will wear out faster. But the only way to really find out is to experiment and see what works for you....also make sure your floor pump is accurate.