Oversze tyres
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Oversze tyres
I have been mountain biking for a long time now and several times have successfully used tyres bigger than the recommended size for the rim. So my question is: how much bigger can you go with 700c wheels (which i am new to)? Whats the biggest tyre youve ever squeezed in there and got away with? My rim is 700/18-23.
Cheers.
Cheers.
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Ben
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So you think frame clearance is the limiting factor? Ah well, thats easy then, got plenty of frame and fork clearance. ill see how i get on with my 23s and maybe try something bigger if they dont like these cracked up roads i ride on.
Thanks
Thanks
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Yeah, and sometimes your brakes will the limiting factor. I suppose there is too big a tire for any given rim, but I haven't hit it yet. I am currently running 32c tires on Open Pro rims (19 width?) on a bike I picked up to run 37c Continental ice tires (using the same rims). I hear it is "better" to be riding wider rims, especially at low pressures and for wind resistance. (I will need real help with that high speed aero drag when I use those sticky ice tires! Yeah, right!) I find cornering works just fine with those skinny rims so I don't sweat it.
Ben
Ben
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Out of curiosity...what frame are you using that you have no concern about tire clearance?
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Just tried uploading a pic but cant for some reason. will try again later.
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Do you know what you have there? Done any research on it? Got any of the old bits? Likely before Raleigh or Falcon grabbed them up so could be pretty interesting old bike - if in any kind of decent shape & you don't eff it up.
I'd (& hopefully others) like to see pics & maybe you should check in with the C&V sub-forum before you do any more damage...
I'd (& hopefully others) like to see pics & maybe you should check in with the C&V sub-forum before you do any more damage...
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Do you know what you have there? Done any research on it? Got any of the old bits? Likely before Raleigh or Falcon grabbed them up so could be pretty interesting old bike - if in any kind of decent shape & you don't eff it up.
I'd (& hopefully others) like to see pics & maybe you should check in with the C&V sub-forum before you do any more damage...
I'd (& hopefully others) like to see pics & maybe you should check in with the C&V sub-forum before you do any more damage...
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seeing as its such an old bike, it most likely has miles of clearance. i have an 87 fuji i could prolly get 40s into without the fenders
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An older 27" road bike frame will fit pretty much any 700c tire.
You'll be able to put 42s on your 23 rims, but the ride is going to suck, I think they call it "fold over" or "roll over". Basically you have no stability in corners because of the balloony shape of the tire squeezed onto a smaller rim.
You'll be able to put 42s on your 23 rims, but the ride is going to suck, I think they call it "fold over" or "roll over". Basically you have no stability in corners because of the balloony shape of the tire squeezed onto a smaller rim.
#18
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An older 27" road bike frame will fit pretty much any 700c tire.
You'll be able to put 42s on your 23 rims, but the ride is going to suck, I think they call it "fold over" or "roll over". Basically you have no stability in corners because of the balloony shape of the tire squeezed onto a smaller rim.
You'll be able to put 42s on your 23 rims, but the ride is going to suck, I think they call it "fold over" or "roll over". Basically you have no stability in corners because of the balloony shape of the tire squeezed onto a smaller rim.
Stu2. FYI, be sure to check for vertical clearance too. I measured a fork once to make sure 35mm tires would fit and there was plenty of width, all the way to the top. When I tried to put the finished wheel into the fork, it was about 3mms too tall. Ooooops. It was an easy fix though, since I caught it before painting.
Last edited by SquidPuppet; 02-11-15 at 06:17 PM.
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generally you can go up 2-5mm on a bike that is designed for fenders (if you don't use fenders).
It depends on the frame, but I have been limited by:
- front derailer motion
- brake mounting point (I have dremmeled brakes, or just taken them off for a FG
- on my road bikes, the width of the brake calipers usually can't be 28mm or the tire will have to be deflated to get them inside the calipers.
- often a slightly bigger tire can be put on the front fork than on the rear - this will give you a little bit more cush up front.
Also, most people should be riding their tires at the minimum pressure on the sidewall. According to detailed testing, there is very very little difference in rolling resistance until you get below a critical point. You can also go 10% less pressure in the front tire since the back tire takes about 50% more weight than the rear wheel
It depends on the frame, but I have been limited by:
- front derailer motion
- brake mounting point (I have dremmeled brakes, or just taken them off for a FG
- on my road bikes, the width of the brake calipers usually can't be 28mm or the tire will have to be deflated to get them inside the calipers.
- often a slightly bigger tire can be put on the front fork than on the rear - this will give you a little bit more cush up front.
Also, most people should be riding their tires at the minimum pressure on the sidewall. According to detailed testing, there is very very little difference in rolling resistance until you get below a critical point. You can also go 10% less pressure in the front tire since the back tire takes about 50% more weight than the rear wheel
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realistically, you can put just about any tire on any rim. I've put 47mm tires on 17mm rims, no problem. The real problem is that you can't run low pressure or you will get some squirm. But if you have enough air in the tire, you are not going to have any issues.
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