I am not sure how much pressure to put in my tyres on my 2 bikes so wondered if anyone can help.
My first bike is a Scott Roadster with 700 x 25 tyres. I have tended to try and maintain pressures at about 110 PSI as I weigh about 15.5 stones and am quite a big bloke. Trouble is that, at this pressure the bike bounces like [censored] and feels like quite a severe ride. A bit less is more forgiving but I have a feeling it won't be enough to protect the rims/wheels if I clout something unexpected.
Second bike is a Dawes Discovery 301, not sure about wheel size so maybe someone can tell me (these measurements are really confusing!) but I am less worried about this one as the tyres are a lot fatter than those on my Scott and will take a lot more biff and bash - I would still like to know though.
I am not sure how much pressure to put in my tyres on my 2 bikes so wondered if anyone can help.
My first bike is a Scott Roadster with 700 x 25 tyres. I have tended to try and maintain pressures at about 110 PSI as I weigh about 15.5 stones and am quite a big bloke. Trouble is that, at this pressure the bike bounces like [censored] and feels like quite a severe ride. A bit less is more forgiving but I have a feeling it won't be enough to protect the rims/wheels if I clout something unexpected.
Second bike is a Dawes Discovery 301, not sure about wheel size so maybe someone can tell me (these measurements are really confusing!) but I am less worried about this one as the tyres are a lot fatter than those on my Scott and will take a lot more biff and bash - I would still like to know though.
The recommended range of pressures should be embossed or printed somewhere on the sidewall of the tyre.
I am not sure how much pressure to put in my tyres on my 2 bikes so wondered if anyone can help.
My first bike is a Scott Roadster with 700 x 25 tyres. I have tended to try and maintain pressures at about 110 PSI as I weigh about 15.5 stones and am quite a big bloke. Trouble is that, at this pressure the bike bounces like [censored] and feels like quite a severe ride. A bit less is more forgiving but I have a feeling it won't be enough to protect the rims/wheels if I clout something unexpected.
Second bike is a Dawes Discovery 301, not sure about wheel size so maybe someone can tell me (these measurements are really confusing!) but I am less worried about this one as the tyres are a lot fatter than those on my Scott and will take a lot more biff and bash - I would still like to know though.
Try good old Sheldon Brown for starting point recommendations:
www.sheldonbrown.com/tires.html
There is a table of recommended starting points for tyre pressures towards the bottom.
If you're finding the 25mm tyres are a bit hard, you might want to try a wider size.
Elsewhere on Sheldon's excellent pages, he'll explain the mysteries of tyre size markings.
"Simonb" <[email hidden]> wrote in message "]news:[email hidden]...
Quoted message said:
Saint wrote:
>I am not sure how much pressure to put in my tyres on my >2 bikes so wondered if anyone can help. >
Quoted message said:
The recommended range of pressures should be embossed or printed somewhere on the sidewall of the tyre.
And don't forget the rims may have a maximum PSI rating too.
tony R.
Good point. It is possible that this may actually be _lower_ than some tyres!
ok, now I'm concerned :-) My rims don't (afaik) have ratings on them. Any ideas where I might find this info? Manufacturer website? Inside the rim somewhere?
ok, now I'm concerned :-) My rims don't (afaik) have ratings on them. Any ideas where I might find this info? Manufacturer website? Inside the rim somewhere?
Pete Biggs posted a link to the Mavic details a few weeks ago. I didn't bookmark it.
"Velvet" <[email hidden]> wrote in message "]news:[email hidden]...
Quoted message said:
Simonb said:
tony R said:
"Simonb" <[email hidden]> wrote in message "]news:[email hidden]...
>Saint wrote: > >>I am not sure how much pressure to put in my tyres on >>my 2 bikes so wondered if anyone can help. >>
>The recommended range of pressures should be embossed >or printed somewhere on the sidewall of the tyre. >
And don't forget the rims may have a maximum PSI rating too.
tony R.
Good point. It is possible that this may actually be _lower_ than some tyres!
ok, now I'm concerned :-) My rims don't (afaik) have ratings on them. Any ideas where I might find this info? Manufacturer website? Inside the rim somewhere?
--
My new (Mavic) rims have the rating printed on the label on the rims themselves. To be honest this is the only reason I became aware this was an issue - I fitted narrower tyres and their max. PSI is higher than the figure on the rims. I'd merrily used the previous (also Mavic) rims for years without giving it a second thought - although with the wider tyres I doubt I exceeded any rating anyway. Mavic also have info on their website eg: mavic.comasphOpen ↗ prod_fiche?product.id=64&lg=uk Sorry about the long url. I'm not computer literate enough to make it manageable.
"Velvet" <[email hidden]> wrote in message news:IoVGc.337$wY.3092703@news- text.cableinet.net...
Quoted message said:
Simonb said:
tony R wrote:
>"Simonb" <[email hidden]> >wrote in message >"]news:[email hidden]... > > >>Saint wrote: >> >> >>>I am not sure how much pressure to put in my tyres on >>>my 2 bikes so wondered if anyone can help. >>> > >>The recommended range of pressures should be embossed >>or printed somewhere on the sidewall of the tyre. >> > >And don't forget the rims may have a maximum PSI >rating too. > >tony R.
Good point. It is possible that this may actually be _lower_ than some tyres!
ok, now I'm concerned :-) My rims don't (afaik) have ratings on them. Any ideas where I might find this info? Manufacturer website? Inside the rim somewhere?
--
My new (Mavic) rims have the rating printed on the label on the rims themselves. To be honest this is the only reason I became aware this was an issue - I fitted narrower tyres and their max. PSI is higher than the figure on the rims. I'd merrily used the previous (also Mavic) rims for years without giving it a second thought - although with the wider tyres I doubt I exceeded any rating anyway. Mavic also have info on their website eg: mavic.comasphOpen ↗ prod_fiche?product.id=64&lg=uk Sorry about the long url. I'm not computer literate enough to make it manageable.
tony R.
Ah, ace! Just looked mine up (MA3's, for my sins) and the tyres'll give out before the rims... or so they reckon, anyway ;-)
ok, now I'm concerned :-) My rims don't (afaik) have ratings on them. Any ideas where I might find this info? Manufacturer website? Inside the rim somewhere?
No, I've never seen a pressure rating actually marked on or in a rim.
Quoted message said:
Pete Biggs posted a link to the Mavic details a few weeks ago. I didn't bookmark it.
"Max pressures" are indicated on the main website. Go to www.mavic.com and find your rim.
I wouldn't worry about them too much. They're conservative generalisations, at best.
