• July 7, 2022

Is 27.5 The Same As 700c?

Is 27.5 the same as 700c? The two main options are 700c which is standard for road and cyclocross bikes or 650b, known in the mountain bike world as 27.5″. Both wheel sizes come with pros and cons making them suitable for different riding purposes and conditions but in certain respects, the two wheel sizes can be relatively interchangeable.

What size inner tube do I need for 700x38c?

The simple answer is: 700x38c converts to around 27.5” x 1.5”.

What size is a 700c bike tube?

Road wheels are usually '700c' sized (622mm in diameter, when measured from the bead seat to bead seat) and will need 700c tubes to match. These are sometimes referred to as 28in tubes, but that's relatively uncommon. Meanwhile, mountain bike and commuter bike wheels and tyres are typically sized in inches.

Are 27.5 and 650b the same?

A 650b wheel is one that's about 27.5 inches in diameter, when measured from tyre edge to tyre edge. This compares to 26in for a standard mountain bike wheel and 29in for so-called '29er' wheels (700c road wheels are also 29in in diameter).

IS 700c and 650B the same?

700c wheels feature a larger diameter rim and are the standard choice for most gravel riding and racing. 650B wheels have smaller diameter rims that are often paired with bigger volume tires for added compliance and traction.


Related faq for Is 27.5 The Same As 700c?


Can you use 650B wheels on a 29er?

Yes The drop will reduce chainring clearance when doing log overs as well. One thing you may want to consider is getting wider 650b rims and going for 650b+ (aka 27.5+) tires as they will fit a lot of existing 29ers and will not alter your geometry significantly. Anything from a 650x2.


Will 700c wheels fit 29er?

You can indeed fit a 700C tire on a 29 inch rim. All you have to do is avoid using an old-style rim with less than 16 spokes per side and your tires should just fine. It is the same size, so you can fit a 700c tire on a 29-inch rim. It will be a little too wide for the rim of course, but it should work.


What does the B in 650b mean?

650b, 700c etc are all old french metric tyre size designations. The “650” denotes approximate outside diameter of an inflated tyre, the b or c refers to width. Originally the French system had tyre widths from a through to e with a being the narrowest.


Are all bike inner tubes the same?

Inner tube sizes explained

First up is the tube's diameter. Most road bikes will have 700c wheels and need 700c tubes to fit. But there are other sizes in use: many gravel bikes like the Pinarello Grevilcome with 650b wheels. It's also the size used on smaller sizes of Canyon's women's range.


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