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FAQ-1 What's the widest tire I can fit on my bike

What's the widest tire I can fit on my bike?

There’s a reason that there’s not a common list of stuff that will fit on a given bike. Most people don’t sit around the shop with a stack of tires trying to fit different ones onto their wheels. A lot of things need to be taken into account when changing a tire size.

Tires need clearance in many dimensions. A tire that is too wide can rub a swingarm, chain, or other parts. A tire that is too large in circumference will change gearing ratios and speedometer readouts, and can contact fenders or swingarms. If clearance is tight when you mount the tire, keep in mind it can still cause problems. Tires “grow” at speed. Temperature and centrifugal force cause a spinning tire to be measurably larger than one at rest.

Wide tires are not necessarily better. They usually “turn in” worse than a skinnier tire of the same make and model, and usually hurt fuel mileage. The common alteration of mounting a wider rear tire may make the bike harder to steer, even unpleasantly or unsafely so.

While wider tires rarely provide performance advantages, some tire manufacturers do offer their own “plus sizing” recommendations, by listing tire sizes larger than stock that are confirmed to fit a certain size rim.


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