Ax-lightness engage Operations Instructions download pdf (Page 41)

Cranksets and chainrings

General notes on mounting

and compatibility

Due to the huge number of frame standards, mount-

ing a crank system (a-d) into a bicycle frame is a job

for a skilled mechanic. The actual work steps vary ac-

cording to the frame and cannot be described in a

single user manual.

For this reason, the rst mounting is a job best left

to your AX-Lightness and engage dealer! If you want

to try it by yourself, be sure to observe the following

chapters.

Also read through the mounting instructions of your

frame and further add-on parts and observe them.

If you have any questions, please contact your AX-

Lightness and engage dealer, call our service centre

on +49 (0)9270 / 91513-0 or send us a mail to info@

ax-lightness.de or info@engage-bikes.de

Technical data:

Crank shaft: BB 386 Evo or BSA bearing with

AX-Lightness bearing cups

Bolt circle road racing bicycle: 110 mm

Recommended chain line

road racing bicycle: 43.5-44 mm

Pedal thread: 9/16“ x 20 TPI

Recommended torque values:

Chainring bolts 6-8 Nm

Crank xing bolt 44-50 Nm

Pedal axles 34 Nm

BSA/BSC bearing cups 35-50 Nm

Crank arm xing on the axle 45-50 Nm

All bolt torque values are only reference

values. Also observe the instructions given

by the manufacturers of the add-on parts

used. If you have any questions, contact

your AX-Lightness and engage dealer.

Mounting the chainrings

AX-Lightness cranks are delivered without chainrings,

which allows you to determine the number of teeth

and the colour you want. If you want to mount chain-

rings, contact your AX-Lightness and engage dealer.

He will procure you the matching components.

Check the correct mounting position of the chain-

rings on the AX-Lightness and engage crank

(e). Make

sure the safety bolt of the big chainring is behind

the crank arm. Make sure the smaller chainrings are

mounted in a way that the chain can change easily

between the chainrings (shifting ramps) and is not

jammed between these and the inner side of the

crank arm. It is therefore crucial to observe the orien-

tation. The chainrings are often marked with arrows

or characters.

Further indications are the counter bores for the

chainring bolts. The crank bolts are typically sunk in

the counter bores so that they hardly stand over.

Insert the greased hollow nut from the rear (f). Tight-

en the greased fastening bolt by hand. Check the true

running of both chainrings before tightening them

crosswise by using a torque wrench to a torque value

of 6 to 8 Nm

(g).

If the hollow nut rotates, keep it tight with a common

special tool or, depending on the model, with an Al-

len key

(h).

Mounting the cranks in BB386 Evo or BB30 bottom

bracket. Standard is history, today‘s bicycle frame

structures come with all possible sorts of bottom

bracket shells. In principal, there are three dierent

bearings they can be combined with, i.e. deep groove

ball bearings which are inserted directly into the shell,

bearings in threaded bearing cups and bearings with

un-threaded bearing cups for press-t.

78 79

Crank systems - Pedals

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Ax-lightness engage Operations Instructions Page 41

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