HOW TO CHECK THE COMPATIBILITY OF YOUR BIKE WITH A CRANKSET ENGINE KIT

To find out if you can install a bottom bracket motor kit on your bike, you first need to measure the length of the bottom bracket of your bike. To do this, turn your bike over and measure the length of the bottom bracket of the frame with a ruler, without taking into account any external bearings (see photos below). There are several standards for bottom bracket lengths. some allow you to mount any engine in our range and other standards will limit the choice to a single engine.

Measurement of a 68/73mm Hollowtech external bearings bottom bracket. In this case, you measure only the frame cyclindon (in black in the photo above). Do not take into account the external bearings (in gray on the photo). If you are between 68mm and 73mm in length, all our crankset motors will be compatible with your bike. If your frame is made of carbon, also check the outer diameter of the case (see below).

Measurement of a Pressfit type bottom bracket. In this case, the bearings are inside the frame, so you measure the cylinder of the casing (in white on the photo).

Measurement of a fat bike bottom bracket. Some bikes, such as fat bikes, have a bottom bracket longer than 73mm and in this case only the BBSHD motor will be compatible.

Depending on the size of your bottom bracket, your bike will be compatible with certain bottom bracket motors :

68/73mm case: compatible with all our crankset motors
Case greater than 73mm: compatible only with the BBSHD crankset motor

Another measurement is necessary to determine the compatibility of a pedal engine. This measure concerns the distance between the centre of the bottom bracket and the lower stay of the rear frame triangle. This measure should above all be carried out for bicycles with original wide tires greater than 2.6''. On these bicycles, the shrouds may come into contact with the engine. This may prevent the installation of the crankset motor or limit the diameter of the primary transmission plate. The distance between A and B (in the diagram above) must be greater than 64mm if you want to install a BBS01 or BBS02 crankset motor. For the installation of a BBSHD pedal motor, the distance AB must be greater than 69mm.

Note however that if the distance A-B is slightly greater than the values mentioned above, it will be possible to add one or two housing spacers in order to slightly offset the motor outwards so that it no longer touches the stay.

Outer diameter of the bottom bracket (in the case of carbon bicycles): If the frame of your bicycle is made of carbon, it is possible that the outer diameter of the bottom bracket may be too large to allow the insertion of the crankset motor. The outer diameter of the bottom bracket must not exceed 61mm.

In the photo on the left, the diameter of the case is 63.42 mm. Installation of the pedal motor will not be possible.

The ISCG legs: On many freeride and enduro mountain bikes, you will find welded legs on the frame. These are the ISCG fastenings for a possible rear derailleur. If your ATV is equipped with these legs, you will need to remove one by cutting or filing it. Note that the use of an anti-derailment plate will properly replace the anti-derail.