Yes, I know it’s not what we used to believe – we were quite surprised when we first saw these results 15 years ago. On rougher roads, there is no doubt: Wider tires are faster because they glide over irregularities that make a bike on narrow tires bounce and vibrate. And we tested on very smooth asphalt – where wider tires are neither faster nor slower.
#Whatsize rims for 700x42 pro#
Conversely, tires narrower than 25 mm are slower – that’s why pro racers have moved from 20 and 23 mm tires to 25 mm in recent years.īy the way, we tested at 22 mph, so this factors in the air resistance of the wider tires. Other tests have shown that even 54 mm-wide tires aren’t significantly slower than narrower ones – provided they use the same supple casings. Bicycle Quarterly‘s latest tire tests, published in the Summer 2021 edition ( BQ 76), have shown this once again: In a real-road scenario, even 44 mm tires don’t roll slower than 28 mm – or any size in between.
Let’s first talk about some fundamentals: Wider tires don’t roll slower than narrow ones. Which is better? Or should you get several wheelsets for different courses? Is there a reason to switch tires and wheels on the same bike? Now you can choose not just how wide you want your tires to be, but – thanks to disc brakes – even which wheel size you want to use! For Bicycle Quarterly’s test, we rode the Open with 650B x 48 mm tires, but our second tester, Nate King, raced his Open with 700C x 44 mm tires. Not too long ago, every performance road bike had 700C x 23 mm tires.
– a carbon race bike that accepts 50 mm-wide tires! Traditionally, fractional sizes are made for straight-sided rims.Our ideas of what is a performance bike have changed a lot in recent years! The most exciting bikes of the moment are bikes like the Open U.P. (E-5) 540 mm British Juvenile, most wheelchairsĢ0 x 1 3/8 451 mm Juvenile lightweights, BMX for light riders, some recumbentsġ6 x 1 3/8 349 mm Older Moulton Brompton & other folders, recumbent front, juvenileġ2 1/2 x anything 203 mm Juvenile, scooters Here's a ton of info:Ģ9 inch 622 mm This is a marketing term for wide 622 mm ("700c") tires.Ģ8 x 1 1/2 635 mm English, Dutch, Chinese, Indian Rod-brake roadstersĦ22 mm (F.13)Rare Canadian designation for the (F.13)ġ 1/4 Northern European designation for the 622 mm (700 C) sizeĢ6 x 1 (650 C) 571 mm Triathlon, time trial, small road bikesĢ6 x 1 1/4 597 mm Older British sport & club bikesĢ6 x 1 3/8 (E.A.3) 590 mm Most English 3-speeds, department-store or juvenile 10 speedsĢ6 x 1 1/2 (650B) 584 mm French utility, tandem and loaded-touring bikes,Ī very few Raleigh (U.S.) & Schwinn mountain bikes.Ģ6 x 1, 1 1/8 High performance wheels for smaller riders, common on Cannondale bicyclesĢ4 x 1 520 mm High performance wheels for smaller riders Terry frontĢ4 x 1 1/4 547 mm British or Schwinn Juvenile They are slightly smaller in diameter than a 27" (630 mm) rim. PS- Road bikes vary widely in terms of the max tire size you can run on them always measure whenever possible.)ħ00c rim diameter is 622 mm, or 24.5 inches. Also, allow some space for general clearance, run-out from a wheel that's come out-of-true, and for fenders if you intend to run those. (Also, keep in mind that a lot of tires measure up in actuality to a figure different from what's printed on the sidewall, so be sure to allow for that. (In metric, that's 311mm to 343mm-a 700c rim is about 622mm in diameter, not including tires.) My guess? You can easily fit 700x35 tires in there, but more is possible. A more accurate approach, as compared to asking folks on RRB, would be to measure your fork and between the stays, at about 12.25 to 13.5" from the axle. Regardless, Le Tours didn't have a whole lot of tire clearance to begin with. Your brake pads will only need to drop about 4mm to meet the 700c rim you can examine/measure your calipers to see if this is possible with your existing brake(s) if not, we can surely point you in the direction of something with more reach. A Le Tour II was spec'd with 27" wheels I'd go 700c to take advantage of more options for tires and a little more vertical space for bigger rubber.
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