How do I choose the best type of mountain bike wheel?
Picking the right mountain bike wheels can be tricky, but don’t let
that put you off because
the right set of
wheels can make a bike feel completely different! The best MTB wheels range from lightweight (1300g) race
models to super strong downhill options, ready to take a beating. Generally speaking, mountain bike wheels
for all-round use should weigh in the region of 1700-2000g for the pair..
With the majority of riders now using disc brakes, rims tend not to have machined braking surfaces, and the
hubs have one of two disc-mounting systems. Six-bolt is the most common standard, while some Shimano hubs
use their CentreLock system. Check which is on your bike already if you’re upgrading, but
you can easily
swap rotors around if your heart is set on a particular mountain bike wheelset.
Most hubs use cartridge bearings, and once you’ve located the bearing number, they’re easy to replace when
they wear out. Shimano hubs use a cup and cone system with loose bearings – they can last for ages, but need
a bit more TLC.
What should I look for when choosing a new set of bike wheels?
Before taking the plunge and spending on a set of wheels, make sure that the axles will match your frame and
fork. Forks will usually be 9mm quick-release (QR), 15mm or 20mm bolt-through. Rear wheels generally need
either standard 135mm spacing and QR axles or 142x12 bolt-through. Some downhill frames may have 150mm rear
spacing. Fortunately, most wheels can accommodate a range of axle standards.
What width is best when choosing bike rims?
Rims come in different widths, with narrower rims (17-20mm) more commonly found on lightweight cross-country
wheels, and wider (20mm-plus) found on trail, enduro and downhill wheels. Wider rims will support wider
tyres, giving them a better profile, but at the cost of increased weight. If you run tyres larger than 2.2
inches, we’d recommend looking at the wider rim widths.
Rims come in either tubeless or non-tubeless designs. Non-tubeless rims can usually be converted to run
without inner tubes. Mavic’s UST system is the original tubeless system, but many companies such as
Bontrager and Shimano make tubeless-ready rims.
Which bike rims work best with mountain bike wheels?
MTB wheels are either made of aluminium or carbon. Most rims are aluminium, and generally cost less, but
carbon rims, while expensive, are both stiff and light – both great attributes! Remember also to check your
wheel size - wheels are available in 26”, 27.5” (650b) or 29” - make sure you get the size compatible with
your frame.
What should I look for when choosing wheels for a road bike?
Road bike wheels are available for every budget. When choosing a new set of
wheels first you
need to look at
disc or non-disc, depending on your bike, but designs are similar for both and there are three main options:
traditional alloy road wheels, light wheels (designed for climbing) and deeper aero-profiled wheels
(designed for speed).
Lightweight road bike wheels will make climbing hills easier, and the best road wheels needn't cost the
earth. Brands like Zipp and DT Swiss offer aerodynamic, lightweight yet
robust wheels sets.
What bike wheels are best for road bikes?
If you’re looking for the best road bike wheels then you should remember that having a light rim means less
rotating weight (far more noticeable than weight anywhere else on wheel), which will have a positive effect
when the road starts to steepen. This is one of the advantages of disc wheels, as they don’t need an
aluminium braking surface there is less weight around the rim.
What are the most popular bike wheels for road racing?
The popular wheels for racing are aerodynamic, with deep carbon-fibre rims. These have been designed in a
wind tunnel to offer an aerodynamic advantage when riding at speed. If you are not riding disc brakes, then
you will require special brake pads. If there is an aluminium braking surface you will need a different type
of pad as these surfaces are designed to be sacrificial so that when the pad pushes on the rim, both the rim
and the pad will wear, so eventually they’ll both wear out.
If the brake surface is carbon you will need special carbon specific pads. With a carbon-fibre rim only the
pad is sacrificial, so a carbon pad needs to be much softer. Carbon-fibre wheels do cost significantly more
than alloy wheels, but should last longer providing they are well maintained and cared for.
A wheel like Mavic's Cosmic Carbone 40c uses a 40mm deep carbon-fibre rim. It’s been designed
in the wind
tunnel to cut through the air and features a special highly heat resistant brake surface for consistent
braking performance.
Can aerodynamic road wheels make a difference in cycling?
A good pair of aerodynamic road wheels will offer serious performance benefits when riding because the
aerodynamic shape will mean less effort is required to maintain higher speeds for longer. All but the very
best aero wheels (and most expensive) will weigh more than the lightest all-alloy climbing wheels, but for
all-round use and not just in the hills, the benefits outweigh the few extra grams.