OLSEN BIKES - Derailleur or Gates Belt drive? YOU choose!

What is the RocknRollout Dropouts all about?

The RocknRollout Dropout is at the heart of the OLSEN frame design. I have focused my design around the rear derailleur dropout, but taken it further.  Most bicycle frames have replaceable dropouts, but they do not allow for anything other than a derailleur. This idea is not uncommon as most UK riders have a winter bike, which is often single-speed.  The RocknRollout Dropouts turn 1 Bike into 2 Bikes giving the rider more versatility.  Summer bike with derailleur; winter bike as single-speed or internal gear hub.


Mokihinui Trail MTB 27.5+ or 29"

MOKIHINUI - Titanium MTN Trail FrameMOKIHINUI - Titanium MTN Trail Frame

Karapoti Gravel Monster Cross

KARAPOTI - Titanium XC Monster Cross FrameKARAPOTI - Titanium XC Monster Cross Frame


ARDNAMURCHAN - Titanium Gravel Cyclo-Cross FrameARDNAMURCHAN - Titanium Gravel Cyclo-Cross Frame

About OLSEN Bikes...

My name is Steven Olsen and I am a "Colonial Commoner" (Mark Kermode reference).  I was built in New Zealand, but have lived in the UK for over 20years... For the last 5 years, I have been developing my own OLSEN bike frames around belt-drive systems and the Pinion gearbox...OLSEN Bikes are designed around the fundamental needs (not want) of a rider....I spent 2020 and 21 designing everyday versatile hard-tail bikes that you can take on the toughest rides.