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700x28 tire on a Bianchi?

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700x28 tire on a Bianchi?

Old 08-15-14, 08:56 AM
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700x28 tire on a Bianchi?

My 98-99ish Bianchi Volce is currently running a 700x 23 or 25 tire. When these tires bite the dust, i've thought about going with a wider tire that might be more gravel road/dirt road friendly. Would a 700x28 tire fit/would there be enough brake clearance?
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Old 08-15-14, 09:32 AM
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I like to use allen wrenches as feeler gauges to measure how much extra clearance I have between my current tires and the chainstays, top of the brake calipers, fork crown, etc. Remember that the difference in tire sizes will be the full amount on top, and half on each side. Then it's just a matter of seeing where you would run into trouble first, and sizing up your tire accordingly, allowing a couple mm here and there as a safety margin.
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Old 08-15-14, 09:37 AM
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Do you between the top of the tire an the brakes? I think clearance between the tire and seat tube may be a bigger concern.

It may be atrial and error thing. This is where is helpful to be friendly with a shop or few cyclist.
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Old 08-15-14, 09:45 AM
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Remember tire sizes vary too. Not every tire size has the same 'profile'. Wider rims will offer a new possibility of shapes, iirc.
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Old 08-15-14, 10:30 AM
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a quick down and dirty way to check: you can wrap a few mm (layers) of thick tape on one area of existing skinnier tires and spin to see if there's rubbing anywhere
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Old 08-15-14, 11:34 AM
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Just measure everything with a micrometer with your current tires on. You want to have @3mm of clearance with the new tire. Beware that not all tires are true size. I have 25c Krylions on my Focus but they actually measure out to 27c. Wanted to try them on my Paramount and the tire rubbed the bottom of the fork.
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Old 08-15-14, 12:20 PM
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It's a good idea to have at least several mm of clearance all around, since without it, a wheel can jam up if a tire so much as suffers the common "outer-ply failure" where the tire suddenly gets a fat spot.

A guy on today's ride was left calling for a ride because he broke a spoke and the generously-sized tire was rubbing the chainstay pretty forcefully.

There are things that stick to a tire's tread and which can lock up a wheel/tire with insufficient running clearance. It's a safety issue, just don't look at track bike tire clearances for a practical reference, they're supposed to be ridden only on a clean track.
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Old 08-15-14, 04:50 PM
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Did you mean to type Volpe or Veloce?
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