Continental GP4000S|| sizing
#1
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Continental GP4000S|| sizing
My lbs shop only have this tires in 25mm, but i want to have 28mm. At my lbs they told me that this Conti tires are bigger than spect and they was not sure they wood fit my Roubaix 14' frame.
Is this true? Or are they only trying to sell me the tires they have?
My bike is spect for tires up til 28mm
They said 25mm is like 27-28mm and 28mm is like 30-31mm american Sizing they called it
Well, enybody have this tires in 28mm on a Roubaix?
Thanks
Is this true? Or are they only trying to sell me the tires they have?
My bike is spect for tires up til 28mm
They said 25mm is like 27-28mm and 28mm is like 30-31mm american Sizing they called it
Well, enybody have this tires in 28mm on a Roubaix?
Thanks
#2
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It depends on the rims. Wider rims will make a tire wider than spec.
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My lbs shop only have this tires in 25mm, but i want to have 28mm. At my lbs they told me that this Conti tires are bigger than spect and they was not sure they wood fit my Roubaix 14' frame.
Is this true? Or are they only trying to sell me the tires they have?
My bike is spect for tires up til 28mm
They said 25mm is like 27-28mm and 28mm is like 30-31mm american Sizing they called it
Well, enybody have this tires in 28mm on a Roubaix?
Thanks
Is this true? Or are they only trying to sell me the tires they have?
My bike is spect for tires up til 28mm
They said 25mm is like 27-28mm and 28mm is like 30-31mm american Sizing they called it
Well, enybody have this tires in 28mm on a Roubaix?
Thanks
EDIT: I just corrected the mistake I had made saying internal width when I meant external.
Last edited by rpenmanparker; 05-08-16 at 09:54 AM.
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For what it's worth I have 25c Conti4000sII mounted on Reynolds Assault wheels on my Tarmac and they fit. I agree that the tire is wider than 25mm. I'm pretty confident a Conti 28 wouldn't ft.
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I bet they're more likely to fit than not. I'm pretty sure a friend of mine has an older Specialized Roubaix and has been running 28mm GP4000 on wide Pacenti rims without issue. The newer versions of the frame are even more likely to accommodate 28mm due to the trend of going wider rims and wider tires.
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My GP4000s 28c tires measure 31mm on my 17mm internal width rims.
Also check out this article. Continental Grand Prix 4000S II 23 25 28 mm Comparison
Also check out this article. Continental Grand Prix 4000S II 23 25 28 mm Comparison
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See the above correction.
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My GP 4000s II 700 x 25s measure 27mm on HEDD Belgium + rims. So on some rims they do get sider than spec.
#11
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So, I suspect that a 25mm Conti might be close to 28mm on the same rim.
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My lbs shop only have this tires in 25mm, but i want to have 28mm. At my lbs they told me that this Conti tires are bigger than spect and they was not sure they wood fit my Roubaix 14' frame.
Is this true? Or are they only trying to sell me the tires they have?
My bike is spect for tires up til 28mm
They said 25mm is like 27-28mm and 28mm is like 30-31mm american Sizing they called it
Well, enybody have this tires in 28mm on a Roubaix?
Thanks
Is this true? Or are they only trying to sell me the tires they have?
My bike is spect for tires up til 28mm
They said 25mm is like 27-28mm and 28mm is like 30-31mm american Sizing they called it
Well, enybody have this tires in 28mm on a Roubaix?
Thanks
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GP4000S measured width:
on a typical 14mm inside / 19mm outside width rim ( rim is from 2010.)
25c is 25.8 mm tire width
On HED Ardennes plus wide rims, 20.6mm inside / 25.5 mm outside width rim:
23c is 26.7 mm tire width, and this works great on this rim.
25c is 29.0 mm tire width (and 25c GP 4-Seasons is the same width.)
on a typical 14mm inside / 19mm outside width rim ( rim is from 2010.)
25c is 25.8 mm tire width
On HED Ardennes plus wide rims, 20.6mm inside / 25.5 mm outside width rim:
23c is 26.7 mm tire width, and this works great on this rim.
25c is 29.0 mm tire width (and 25c GP 4-Seasons is the same width.)
Last edited by rm -rf; 05-09-16 at 02:46 PM.
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GP4000S measured width:
on a typical 14mm inside / 19mm outside width rim ( rim is from 2010.)
25c is 25.8 mm tire width
On HED Ardennes plus wide rims, 20.6mm inside / 25.5 mm outside width rim:
23c is 26.7 mm tire width, and this works great on this rim.
25c is 29.0 mm tire width (and 25c GP 4-Seasons is the same width.)
on a typical 14mm inside / 19mm outside width rim ( rim is from 2010.)
25c is 25.8 mm tire width
On HED Ardennes plus wide rims, 20.6mm inside / 25.5 mm outside width rim:
23c is 26.7 mm tire width, and this works great on this rim.
25c is 29.0 mm tire width (and 25c GP 4-Seasons is the same width.)
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Going along with others, my 4000S 25mm's measure at the high end of 27mm on the original HED Belgium rims, and 28mm's measure 31.7mm on Roval Axis 4.0 wheels (wide, but not overly so).
The 28's with latex tubes are amazing if you can get them to fit.
The 28's with latex tubes are amazing if you can get them to fit.