31
THRU AXLES
Thru axles
(a)
are mounted when WHEELER bicycles have to withstand
high stress occurring e.g. during freeriding, cross-country, downhill rid-
ing or jumps. They provide suspension forks with a suitable stiffness.
i
Before mounting or replacing a fork/wheel combination
with thru axle system, be sure to read the operating in-
structions of the respective suspension fork or wheel man-
ufacturer first.
Notes on How to Mount Front Wheels
There is a wide range of thru axle systems available now. Some sys-
tems are tightened with quick-releases. Other systems may require
special tools for assembly or disassembly
(b+c)
.
With the
conventional thru axle system
slide the thru axle through
the fork and the hub in a way that the head of the Allen bolt comes to
a rest on the right side (the chain side of the bicycle). Once the axle is
mounted, gently let the fork deflect a few times
(d)
, thus excluding the
chance of the axle getting jammed. Screw the nut onto the axle and
tighten it according to the enclosed instructions of the suspension fork
manufacturer. To lock the axle, finish by tightening the Allen bolts at the
front of the fork, according to the enclosed instructions of the suspen-
sion fork manufacturer.
If you are in doubt or if you have any questions, contact your WHEELER
bicycle dealer.
Check the reliable fit of the bolts after one to two hours in use and then
every 20 hours.
If your bicycle is equipped with a
maxle thru axle system
(e)
with
quick-release lever, put the wheel into the fork and mount the rotor in
the brake calliper. Bring the wheel into the correct position between the
drop-outs and slide the axle with the open Maxle quick-release lever
from the right side through the drop-out and the hub. As soon as the
axle thread engages with the thread of the left drop-out, tighten it by
turning the whole Maxle clockwise. Close the Maxle thru axle quick-
release lever like a usual quick-release lever (see above section “How
to Fasten Components Securely“).
The
Qr15
or
e-thru system
(f)
has been developed jointly by
Shimano and Fox and is a 15 mm thru axle that optimises weight. It
is mounted like the Maxle system and also operated with a quick-
release lever. The special feature of the QR15/E-Thru compared to
usual quick-release systems is the firm, bolted connection of the tight-
ening nut to the fork leg on the opposite side of the quick-release lever.
For dismounting the front wheel you may need tools
(g)
according to
fork manufacturer and thru axle system. To dismount the wheel, loosen
the axle support at the fork and remove the axle completely from the
hub.
To remount the front wheel proceed in the reverse order. Make sure all
bolts/quick-release systems are tightened properly.
Check the reliable fit of the bolts after one to two hours in use and then
every 20 hours in use.
g
Improperly mounted wheels may throw you off your bicycle
or result in serious accidents!
a
To mount the axle only use the tools recommended by the
manufacturer. Make it a rule to use a torque wrench
(h)
.
Tighten carefully by approaching the prescribed maximum
torque in small steps (0.5 Nm increments) and check in be-
tween the proper fit of the component. Never exceed the
maximum torque value indicated by the manufacturer! A too
tight fixing of the axle can damage the axle or the fork leg.
a
b
c
d
30
e
f
g
h
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