Bike tyre pressures

Size of tyre, what you pump in, and why?

1 to 20 of 29 messages
Blisters    pirate
14/06/2013 at 23:10

Because I'm just guessing.

Trogs    pirate
14/06/2013 at 23:25

I look at what is says for min/max on the tyre wall and go for somewhere towards upper end of range; on the road bike that's around 100psi.

 

Mr StOat    pirate
14/06/2013 at 23:32

700/23 I use 100psi

Symes    pirate
15/06/2013 at 00:04

IIRC 22 conti tubs at around 140psi, nice lower rolling resistance for added speed, apparently 

Rafiki    pirate
15/06/2013 at 08:41

Most manufactures websites will tell you what pressure to use based on tpi (threads per inch) of tyre and your weight. For example I have 3 different types of Vittoria tyre on 3 bikes - 1 at 90tpi, one 120 tpi and race tyres at 360tpi - they should be inflated to 95, 105 and 125 psi repsectively.....apparently

Blisters    pirate
15/06/2013 at 09:20

What about the difference between wet and dry conditions?

cougie    pirate
15/06/2013 at 09:26
I swear by conti gp4000s 23mm. I run them at 90-95 PSI with no problems.
If its wet out I'll use a little less.
TheEngineer    pirate
15/06/2013 at 09:53
Rafiki wrote (see)

Most manufactures websites will tell you what pressure to use based on tpi (threads per inch) of tyre and your weight. For example I have 3 different types of Vittoria tyre on 3 bikes - 1 at 90tpi, one 120 tpi and race tyres at 360tpi - they should be inflated to 95, 105 and 125 psi repsectively.....apparently

Corsa Evo CX? Great rubber!

I run Schwalbe Ultremo on roadie, 90 in the wet, 100 in the dry, 110 on commute because the roads are sh¡t and although lower pressures are comfier I pinch flat less. TT gets the 360tpi treatment and 130-140 psi - Outlaw half was a bit bumpy after the perfect roads of Mallorca!

Rafiki    pirate
15/06/2013 at 10:17

Indeed - Corsa CX !! And it comes in different colours to match the bike

15/06/2013 at 10:37

Depends on the bike:

MTB at 35 to 40 psi (depending on the trail type & conditions).

Commuter at 60 psi, it's a slick tyred mtb.

Road 110 psi.

TheEngineer    pirate
15/06/2013 at 10:53
Rafiki wrote (see)

Indeed - Corsa CX !! And it comes in different colours to match the bike

Mine are blue

15/06/2013 at 14:27

Conti Gp4000s on mine, 95 at front 100 at rear, 25mm as lower rolling resistance and confort. 105kg here.

seren nos    pirate
15/06/2013 at 14:32

my ones on my race bike say max of 175.........but i just pump it up till it fels hard and leave it.........would be scared with that pressure i would be bouncing over the road

WhizKid    pirate
15/06/2013 at 14:44

It makes a huge difference between tubs and clinchers, clinchers on average are 100 my race ones are about 110 give or take 1/2 psi, on tubs however its a different story where a lot will comfortably hold 160, I don't adjust for the wet tbh as on a road bike I don't think it makes a bit of difference, however on a mtb that's a different story

seren nos    pirate
15/06/2013 at 17:52

mine are normal tyres so i was suprised when they say 175 max on them............I would never go more than 120 ........if i had a guage to measure it

IronCat5    pirate
15/06/2013 at 21:52
TheEngineer wrote (see)
Rafiki wrote (see)

Most manufactures websites will tell you what pressure to use based on tpi (threads per inch) of tyre and your weight. For example I have 3 different types of Vittoria tyre on 3 bikes - 1 at 90tpi, one 120 tpi and race tyres at 360tpi - they should be inflated to 95, 105 and 125 psi repsectively.....apparently

Corsa Evo CX? Great rubber!

I run Schwalbe Ultremo on roadie, 90 in the wet, 100 in the dry, 110 on commute because the roads are sh¡t and although lower pressures are comfier I pinch flat less. TT gets the 360tpi treatment and 130-140 psi - Outlaw half was a bit bumpy after the perfect roads of Mallorca!

Ultremo 23s at 110 psig on the TT. Roadie has 25mm Durano plus at 90 psig. Both for wet and dry. TT clincher wheels only rated to 120 psig.

Was planning on some Corsa Evo CX clinchers for the TT but haven't yet got round to it.

PSC    pirate
16/06/2013 at 07:12

Interesting read here if anyone is interested... 

http://janheine.wordpress.com/2012/06/13/bicycle-quarterly-performance-of-tires/

16/06/2013 at 07:41

interesting but i'd like to see the original test results.    I can't believe a change of tyre can give a 20% speed increase unless the original tyre was a MTB tyre and there is no way a 42mm tyre is as quick as a 23-25mm tyre - it might roll well but they ignore the weight at the rim.     

iron fraggle    pirate
16/06/2013 at 09:12

Can someone translate those figures from psi into bars for me ?  I pump my tyres to about 7 bar - is this right ?

seren nos    pirate
16/06/2013 at 09:22

7 bar is 101 psi

 

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