The Jump Stop weighs 30 grams. • The clamp is UV-stabilized DuPont Zytel (black only). • All steel is 304 stainless. • Allen wrench included. • Lateral range of adjustment covers a gap between frame tube and chain of between 12mm and 35mm.

In most cases, the needed Jump Stop clamp size will be the same as the front derailleur clamp size.  If there is no size stamped on the front derailleur, or there is no front derailleur, the easiest way to determine seat tube diameter is to cut a strip of paper 4 inches (100 mm) in length, and wrap it around the seat tube. If the ends overlap by more than a quarter inch (7mm), it's probably 1-1/8 (29mm).  (Exception, some recumbents and old American bikes with one-piece cranks may be smaller.)  If the ends just barely meet, the size is probably 1-1/4 (32mm). If the ends have a gap between them greater than a quarter inch (7mm), it's probably 1-3/8 (35mm). If you have questions about how difficult it is to mount the Jump Stop, the instruction sheet is reproduced here.

You can order by e-mail at ngear@gvtc.com or by phone at (830) 755-4607.  I will need to know quantity, size(s) and a destination postal address.

I accept Paypal, either direct to ngear@gvtc.com or I can e-mail an invoice link, or I can accept cash by mail to the address at bottom.  If you send cash or direct payment to Paypal, please also let me know by e-mail.

Pricing:
The Jump Stop costs $10 per unit.

Shipping (by standard mail):

U.S. -  $6 per shipment (containing any number of units)
Canada - $16 per shipment (containing up to six units*)
Overseas - $22 per shipment (containing up to six units*)
* I may have to leave out some Allen wrenches to keep from exceeding the weight bracket.  Contact me if you need international shipping costs for more than six units.

Feel free to e-mail or call if you need further information.  Thank you for considering the Jump Stop.