Tiresizes can be extremely confusing as we mentioned in our article about 28 inch and 700c wheels. You can use the table below to convert from the different industry standards. Inch BSD (ERTRO) Inch French 12″ 47-203 Thesimple answer is that 700mm is equal to 27.5 inches. Unfortunately, when it comes to bike tires, nothing is ever so simple. A 700 tire can’t usually be swapped for a 27.5in tire. I’m going to give you a quick rundown of: – How to find your correct tire size. – What the numbers actually mean. With650B on S and below, and 700C on everything else. I haven't ridden a 650B gravel bike yet, but I like the idea. Toe overlap sucks on small gravel frames with 700C wheels. 27.5 makes a lot of sense for small MTB. 29 is too big and handles poorly on small mountain bike frames, and looks even worse (not that it's about looks). MTBis definitely moving towards, if not setting on 29" wheels, and gravel bikes are becoming more MTB all the time. 650b on a gravel bike seems like a step backwards if you can run an equal, or nearly equal, width tire on a 700c rim. Those of us who are smaller do not fit on 700c bikes with huge/wide tires. TheBead Seat Diameter or also called BSD is the measurement that determines whether a particular tire will be compatible with a particular rim or not. The Bead Seat Diameter of 27-inch tires is around 630mm or 24.8 inches. 27-inch tires and 700C tires are not too much different in relation to size. Continue reading to find out about how 700C Obviouslyyou'll need 700c wheels too, not just tires, and make sure to get the right hubs for your frame. 650b and 700c can be the same outer diameter, depending on the tire, and your gravel tire will almost definitely be narrower than the 29 tires are the same rim diameter as 700c, however, sometimes the 29” tires might not be the perfect fit for a 700c road rims as they might be too wide. What is a 27.5 Plus tire? This27.5”/650B diameter mountain bike tube is compatible with ” wide mountain bike tires. For the most precise fit, choose a tube with the smallest range that still contains your bike tire’s width. For instance, if your bike tire is 2.4”, a tube with a 2.2-2.4” range will offer a better fit and feel than a tube with a 2.4-2.8 lV293.

700c vs 27.5 vs 29