Precision machined front spool/solid axle in Serpent spring steel combined with alu pulley-flange. Weigth: 19 grams ( use the original diff pully) Replaced by 804374 http://www.serpent.com/product/804374/
A combination of a strong Serpent spring steel axle with an aluminium pulley flange. Both the steel axle and the aluminium part have been lightened as much as possible.
The same pulley as used on the front differential is also used for this spool. ( item #804147 )
Replaced by :
http://www.serpent.com/product/804374/