Whileyou could fit any width tyre to any width rim, it’s best to find a suitable width rim to match the tyre width. The CTC recommends the ideal relationship between a rim and tyre as being about 1.8 times. Rims measuring 15 to 17mm across are the most common used for road bikes and accommodate tyres ranging in width from 23 to 50mm. 29ervs 27.5 vs 700c Size Comparison General Discussion : The Paceline Forum > General Discussion: 29er vs 27.5 vs 700c Size Comparison It's not going to be an issue. I doubt she will be able to tell the difference geometry, as it will be very subtle. People run CX tires on 29ers all the time with zero issues. But to put some figures out there: Theexact line in the sand between them is arbitrary. One can take a random 700c tyre and fit it on a so-called 29″ rim, but it would be a good idea to choose a wide tyre, say at least 32-45mm, rather than 23-28mm, because the rim will be wider. A 23-28mm 700c tyre will fit, but will not sit flush with the border of the rim. DifferencesIn Size And Diameter. The primary difference between these bike tire types is their size and diameter. 27×1 1/4 tires are typically found on older road bikes, while 700c tires are commonly seen on modern road bikes. The 27×1 1/4 tires have an outer diameter of 27 inches and a width of 1 1/4 inches, while the 700c tires have an Fora short time, the 700c wheel size became the standard mountain bike wheel size. The industry re-labeled the 700c wheel mountain bike size as 29", or 29'r because with a really wide tire it was 29" in diameter. During this period, it was difficult, if not impossible to sell a mountain bike with anything but 29" wheels. Theterms 700c and 29 both refer to the same wheel size for bikes. The diameter of the wheel is approximately 29 inches or 700mm, hence the interchangeable naming. The 700c/29 wheel size is commonly used on road bikes, hybrid bikes, and many mountain bikes. The larger wheel size provides faster speeds, better momentum, and Bestoverall inner tube: Schwalbe SV15 Road Tube — Buy Now for £4.00 from Merlin Cycles. (link is external) | Find out more. Lightest inner tube: Tubolito Tubo Road 700C — Buy Now for £20.90 from Mantel. (link is external) | Find out more. Best on a budget: LifeLine Road Inner Tube — Buy Now for £2.49 - £2.99 from Wiggle. (link is 29x decimal (you see this on mountain bikes; usually only applied to wide rims) 28"x decimal (particularly in Germany) 28" x some fractions (seems to be a rare Canadian / northern European thing). 700 mm is roughly 27.5 inches, so if you mounted a reasonable tire on it, you'd get around 28 inches (hence the name 28"). Thebest gravel bike tyres in 2024: 700c and 650b tyres for gravel. We put the best gravel bike tyres head-to-head in 2024, with top-rated options from Continental, Schwalbe, WTB, Pirelli TheSurly Bridge Club, Surly Bridge Club Majestic Moss and Black - 27.5, and Surly Bridge Club Black, 700c are all steel frame gravel bikes with upper mid-range components and hydraulic disc brakes. The Bridge Club Majestic Moss and Black - nMIGrR.