Gtin: LCF_Adaptor_1

Ashtabula Bottom Bracket Adaptor


Ashtabula Bottom Bracket Eccentric Adaptor – allows installation of a Tongsheng mid motor on to bikes with a 51.3 mm bottom bracket internal diameter.

Available on back-order

SKU: LCF_Adaptor_1 Category:
LCF Technics Logo

The Ashtabula Bottom Bracket Adaptor set (2 items per set) is an eccentric adaptor.  It converts the American Ashtabula bottom bracket for use with Tongsheng mid motor upgrade kits. (Here)

The adaptor fits a bottom brackets with an internal diameter of 51.3mm.  Larger diameter bottom brackets are often found on bikes with single piece cranks.

This adaptor is not internally threaded and is a press fit in to the frame bottom bracket.

For motor installation – an eccentric Ashtabula bottom bracket adaptor is required.  A concentric adaptor doesn’t have enough clearance between the crank input shaft and the motor body.

This is used to convert a 51.3 mm internal diameter bottom bracket to the more common 33 – 34 mm used by mid motor kits.  It’s manufactured from aluminium alloy.

Note: If you are removing a single piece crank set, as in the image,  you’ll probably need a new set pedals too.  Ashtabula cranks typically use pedals with a 1/2″ spindle diameter.  The cranks on your motor kit will use pedals with a 9/16″ diameter left and right threaded.


LCF Technics

Eco Friendly Transportation
LCF Technics recumbent tricycles help to benefit your health by maintaining fitness.  They’re incredibly comfortable to use due to the natural seating position. Our trikes are also great fun to ride and not so easy to fall off! Electric assisted trikes represent a massive reduction in carbon emissions compared to standard and even electric cars. Therefore, an LCF Technics Trike an excellent choice for those who are prepared to make subtle changes to their lifestyle - in order to make a significant difference to their carbon emissions. Our trikes are built by fully trained engineers, to the highest quality standards. The design has a short wheel base - for a tighter turning circle.  Gear ratios are set up to take you from the mountains of Mourne to Hungry Hill. Start the transformation today – with an LCF Technics tricycle.
LCF Technics Logo

You may also like…