Ko je naklon pri vzponu že tako strm ali pa je podlaga nemogoča, vas mogoče reši le še dotični, zelo redek, verižnik z (le) 20 zobci. Kompatibilen z večino gonilk na tržišču - BCD ali bolt circle diameter je 64mm.

The steel version of the 20/4 stambecco (stambecco Impact) is not more durable against abrasion than our special aluminium alloy of the normal stambecco. Our special alloy is nearly as durable as steel. But it cannot withstand as good as steel does to actual punctual high pressure as it may be in special bikes such as tandems or bike constructions for handicapped people or so on. Such pressure never is in mountainbikes. And because the stambecco Impact is more expensive and much heavier than the normal stambecco you never need to buy it for a mountainbike.

- Proizvajalec: Mountain Goat
- Št. zob: 20
- Št. lukenj: 4 (BCD 64mm)
- Barve: črna (aluminij), srebrna (jeklo)
- Material: aluminij
- Premer: 45.3mm
- Preverjena teža: 18g* (*aluminijast)
- Vijaki so priloženi

Montaža verižnika - by Luka Gratej