Scotty C
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Registered: 6th Nov 05
Location: Kidderminster Drives: 1.6 16v Sport
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Went into halfords the other day and was speaking to someone that seemed clued up about mountain bikes. So I asked about tyre pressures (on & off road) and he said anything up to 60psi on road, but he runs his at 50psi (thought this was a lot?) and off road at around 35psi.
So I got home and set both tyres to 50psi. And my god, they seem WAY too hard, u can feel every little bump and the bike jumps all over the place 
So, what pressures to do u lot run? Don't use the bike for anything fancy yet, just commuting and the odd bike ride down the canal 
Thanks
[Edited on 09-09-2010 by Scotty C]
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chr15barn3s
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Registered: 5th Oct 03
Location: Farnborough
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That doesn't sound too far off tbh. Pretty much what I tend to do.
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spikedjack
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Registered: 16th Oct 08
Location: wolverhampton/cannock
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depends on the tyre.
My XC bike i run 65psi on the road and between 25-40 off road depending on condtions thats on GEAX barrowmountains
my street bike i run 90psi all round on maxis hookworks
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C2RL R
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Registered: 28th Mar 02
Location: Redcliffe, QLD
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i tend to stick to 40psi but even that can be a little hard on cobbles etc. this is why my next bike will be a full sus XC.
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gavin18787
Premium Member
Registered: 22nd Feb 05
Location: Basildon, Essex
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scott xc bike which only see off road action Maxxies high rollers @ 30ish psi
Commute bike with 26inch 1.9 michelin semi slicks 50ish psi
Drives supercharged Tec with torque  
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Scotty C
Member
Registered: 6th Nov 05
Location: Kidderminster Drives: 1.6 16v Sport
User status: Offline
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Oh right. Seems way to stiff. I'll drop a few psi when I take it off road then
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deano87
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Registered: 21st Oct 06
Location: Bedfordshire Drives: Ford Fiesta
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Generally speaking the rockier it is, the less PSI you need. But obviously climbing you don't want it super soft otherwise you lose and lot of power through the tyres.
Off road - use what feels right for the conditions.
Road - hard as fuck for the least rolling resistance.
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Chris Bingham
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Registered: 30th Mar 02
Location: In Scotland
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dont worry about pressures - just get it how you like it!
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ed
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Registered: 10th Sep 03
User status: Offline
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Depends on the tyres. My old muds work at 12psi...
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Chris
Premium Member
Registered: 21st Sep 99
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i run 50psi on schwalbe cx comp for road use, harder the tyre the less in contact with the road so smaller rolling resistance which means less effort, same side effect is u feel every bump. Also lower preasure with squash as you pedal resulting in a loss of power here also.
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mwg
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Registered: 19th Feb 04
Location: South Lakes
User status: Offline
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quote:
Originally posted by deano87
Generally speaking the rockier it is, the less PSI you need. But obviously climbing you don't want it super soft otherwise you lose and lot of power through the tyres.
Off road - use what feels right for the conditions.
Road - hard as fuck for the least rolling resistance.
If you are doing a rocky route you want them at higher PSI to help avoid getting snake bites...
I run mine 45 PSI on the rear and 30-35 PSI on the front generally all the time as pretty much everything I ride is mega rocky.
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ed
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Registered: 10th Sep 03
User status: Offline
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If you've got good tough tyres then running them soft on the rocks is pretty good...
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mwg
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Registered: 19th Feb 04
Location: South Lakes
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Maybe if you're running some heavy dual ply DH tyres that works but for you're average XC tyre if you run them soft on the stuff like I ride you go through a lot of tubes quickly.
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Scotty C
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Registered: 6th Nov 05
Location: Kidderminster Drives: 1.6 16v Sport
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quote:
Originally posted by Chris Bingham
dont worry about pressures - just get it how you like it!
Yeh doesn't seem a bad idea. 50psi seems ridiculous on the road and I fucking hate it. I don't mind loosing some resistance to gain move comfort and control.
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AlexW
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Registered: 25th Oct 08
Location: Essex
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I run 90psi front and rear on my bmx which i use a fair amount on road.
Mountain bike thing is keept at roughly 25psi as its never used on smooth roads and the like. Although currently its 0psi after bending the rim.
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deano87
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Registered: 21st Oct 06
Location: Bedfordshire Drives: Ford Fiesta
User status: Offline
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quote:
Originally posted by mwg
Maybe if you're running some heavy dual ply DH tyres that works but for you're average XC tyre if you run them soft on the stuff like I ride you go through a lot of tubes quickly.
If you run high PSI on the rocky stuff you'll be all skitty and have no control. Just run DH tubes in XC tyres.
When ever I used to do 'epics' in Wales or the Peaks, we'd change tyres to something a bit chunkier.
And I've never got a pinch flat
[Edited on 10-09-2010 by deano87]
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