Spindle Size: These cranks use a 24mm spindle

2018+ only

Extends downs the sides and back of the head for greater coverage

Great side visibility and a LED battery indicator make them easy to tell when you have reached your max run time of up to 5 hours

Cons: If you prefer channeled saddles this one is not for you

TowWhee Quick Loop with Mini Carabiner - Green Heavy/Bulky Spindle Size: These cranks useThis handy little carabiner and loop system will increase the versatility and ease of installation removal of your sweet TowWhee system. Who's this for: People with the original TowWhee system looking to make it easier to take it off and on. Install: Loop the quick loop around your Towee's stem or the Tower's seat rails and then use the included carabiner to make super quick connections and disconnections. What's in the box: Extra quick loop strap and