Are there different size Presta valves?
Presta valve inner tubes are available from a range of makers with valve lengths up to 80mm. There’s no harm in using a valve longer than you need, although it might look a bit odd to use a particularly long valve on shallow wheels.
Can I use 700C tubes on my 29er?
700C tyres on 29er rims works just fine; just beware of running narrow (25C and below) tyres on wide rims.
What is the standard Presta valve size?
Threading. The valve threads for Presta valves follow the ISO 4570 standard. The external threads at the tip of both “threaded” and “unthreaded” Presta valves are 5V2 (#12-24TPI), which measures out to 5.2×1.058 mm, the same thread size as the tip of a Dunlop valve.
Does the MM of a Presta valve matter?
The 48 or 42 mm length listed below is the length of the presta stem. You just need 12-15mm of stem to stick beyond the rim so you can get a pump onto it, though, for some people, a little extra length isn’t a bother. If you’ve got a deep rim, you’ll need a longer valve stem.
Is 29 inner tube the same as 700C?
Mountain bike tyre sizes are usually stated in inches. So a 29 inch MTB tube will have the same diameter as a 700c road wheel, while a 27.5 inch tube will be the same diameter as a 650b road wheel. You can also get 26 inch MTB tubes.
What is the inside diameter of a Presta valve?
The Presta valve hole is 7mm in diameter, and the Schrader valve hole, 8.5 to 9mm. Presta inner tubes may be used in rims that are drilled for Schrader or Woods valves, though it is advisable to install a rubber grommet in the valve hole.
Will a 27.5 tube fit a 29 wheel?
No, it’ll be fine. Have you played the innertube-pump-until-it-blows game? 26ers end up like tractor tyres before they let go. Always carry a presta-valved 27.5 tube with me as a spare, can be used for 26/27.5/29 wheels with presta/schrader size valve holes so covers all bases.
IS 700C the same as 28?
28”/700C/29er The tyres can differ, but the 28”, 700C and 29er are all the exact same rim diameter. The 700 markings will be followed by the width in mm, and the 28 or 29 markings will be followed by the width in inches. This is the most common wheel size, so look out for familiar markings (such as 28×1.
IS 700C and 29 inch the same?
29″ (ISO size 622) is actually the same rim diameter as 700C, although most 29″ tires will not fit 700C road rims because they’re too wide. 29″ tires are popular with mountain bikers; search for 29″ MTB.
IS 700C 28 or 29?
The wheel sizes 28”, 700C and 29er or 29” all refer to the same rim size: ETRTO 622. The tyres can differ, but the 28”, 700C and 29er are all the exact same rim diameter.
How do I know what size Presta valve I need?
In most cases, adding 15mm to the height of the rim is a reasonable rule of thumb when it comes to deciding on a valve length. That extra 15mm is important because it provides enough length to fit any pump head.
What size Presta valve do I need for tubeless?
| Rims Depth | Recommended Tubeless Valves Length |
|---|---|
| under 24mm | 35mm |
| 25mm~34mm | 44mm |
| 35mm~40mm | 55mm |
| 45mm~49mm | 60mm |