some manufacturers offer frames have removable rear dropouts that can be swapped for through-axle
, quick release other style dropouts. With some forks it is possible and cheaper (but never cheap) to replace just the lowers.
What is a mountain bike through axle?
What is a thru-axle on a mountain bike? A thru-axle (TA) is
a wheel attachment system that secures a wheel on a hub between a pair of dropouts on a bicycle frame or fork
. The thru-axle threads directly through the fork/frame holes and into the wheel hub, which makes the wheel secure from detaching.
What size thru axle do I have?
For this reason, thru-axles should be measured by overall length. Depending on the thickness of the dropouts, total length is usually 20-30mm longer than OLD. The most common front thru axle OLD dimensions are
100 mm, 110 mm, and 150 mm for front axles and 130mm, 135mm, 142mm, 148mm, and 197mm for rear axles
.
How do I know what size axle I need for my bike?
Measure the straight length of your axle shaft
. Do not include the axle head or tapered spacer, if there is one. Axle length is not the same as hub length. A bike with a 12×142 hub standard will have a significantly longer axle since it will have to go through the frame on both sides of the 142mm wide hub.
Can QR hub convert to thru axle?
If it’s a front hub and your fork uses a QR,
you can buy a new thru-axle hub and an adapter that lets you use a thru-axle hub in a QR fork
. About $15 for the adapter. This will give a fractionally better bit of firmness, but primarily, if you change your fork down the road, you can get one with thru-axle.
Can you convert 9mm QR to thru axle?
Registered.
You can only mount the type(size) rear axle that your frame will accept
. If it currently is fitted with a QR the frame most likely has a 10mm. vertical dropout (not 9mm.)
How do I know if my bike has a thru axle?
Thru Axles
Your bike has a thru axle
if the “drop out” is a hole, rather than a U-shaped dropout
. This provides added security because even if the lever on the end of the thru axle flips open, it is still threaded into the frame, holding your wheel on.
What is a 12mm thru axle?
From this specification we know 142mm is the hub width (or frame spacing) and 12mm is
the diameter of the axle
. We need to specify the following items to get the proper replacement Thru Axle.
What is the advantage of a thru axle?
Thru-axles
increase the rigidity of the wheel-frame interface and allow more accurate wheel placement
. This is particularly important for brake discs, where small pad clearances mean that a slight misalignment will cause rubbing. They also eliminate the risk of the wheel coming loose from the quick-release dropouts.
What size are mountain bike axles?
| Name Front axle (length × diameter) Rear axle (length × diameter) | Quick-release 100mm × 9mm 135mm × 10mm | Non-Boost thru-axle 100mm × 15/20mm 142mm × 12mm | Boost thru-axle 110mm × 15/20mm 148 × 12mm | Superboost thru-axle 110mm × 15/20mm 157mm × 12mm |
|---|
How do you measure a rear axle on a mountain bike?
For a front thru-axle, this is measured from the inside to inside of your fork. For a rear thru-axle, this is measured
from the inside to inside of your frame at the drop-outs
. The O.L.D. measurement is listed for many thru-axles, but isn’t necessary if you know the overall length.
Are thru axles universal?
The new Universal Thru-Axle takes the guesswork out of choosing your axle and also future proofs you in case you swap bikes or indeed have different bikes with differing axles.
What is boost MTB?
A new Mtb hub arrived on the market over the last few years. Its name is Boost,
a dropout standard designed to widen the hubs on wheels, increasing the rear axle by 6mm and the front axle by 10mm without compromising modern trail geometry or durability
.
Are all thru axles the same?
Why are there different sizes? As with many things in the cycling industry,
thru axles are not standardized
. Your thru axle standard will depend on your bike’s manufacturer and your bike’s intended use.
Which is better thru axle or quick release?
1.
Thru axles are safer
– This is probably the biggest benefit for the average cyclist. Thru axles improve safety by making it nearly impossible for the front wheel to come out of the dropouts while you’re moving. The dropouts can’t lift off of the axles vertically because they have holes instead of a u-shaped slots.
Can you convert skewer to through axle?
Can I use QR on thru axle fork?
If you’re fortunate enough to have a newer hub though, it’s simply a matter of popping off the QR end caps and installing the correct thru axle end caps for the fork you’re using.
This adapter from Problem Solvers will allow you to mount a 12mm thru axle hub in a QR fork, but not the other way around
.
How do I convert my axle wheel to QR?
What is 9mm QR?
9mm QR is
the standard (but maybe not for long) front wheel retaining system
that has been used for many years. QR stands for quick release. 9mm is the size of the skewer that goes through the front hub.
How do bolt through axles work?
How do I convert quick release to bolt on?
Do you grease a thru axle?
Thru-Axle or Quick Release Skewer
A thru-axle is a hollow, yet stronger and thicker style axle that uses the same camming mechanism you would find on a QR. Although a QR and a thru-axle are slightly different,
you would grease them in the exact same way
.
Are thru axles stiffer?
Compared with open dropouts and quick-release skewers,
thru-axles are generally stiffer
, safer and more precise. This translates to noticeably more predictable handling – even with rigid forks and hardtails – fewer accidents related to misuse, and more consistent wheel placement in the frame and fork.
What does old stand for bike?
The hub spacing is measured from the outside face of the lock nuts (or equivalent), this is commonly called the “O.L.D.” (
Over-Lock-nut Dimension
)
How do you install a thru axle?
What is boost spacing on MTB?
Boost spacing
allows for wider hub flange spacing
, which correlates to better spoke bracing angle and dish when building wheels (this makes the wheels stronger). The brake rotor sits 3mm outboard of where it did before, as does the rear cassette.
