It s the distance that the fork blades angle forwards relative to a perpendicular line drawn through the fork s steerer.
Standard road bike fork rake.
Fork rake comparison for 57cm bikes.
Fork rake offset and trail.
Bicycle forks usually have an offset or rake not to be confused with a different use of the word rake in the motorcycle world that places the fork ends forward of the steering axis this is achieved by curving the blades forward angling straight blades forward or.
The combination of head angle fork rake and trail has a significant impact on the handling of the bike.
A 2007 nevada classic 750 with a rake of 27 5 fork offset.
Head tube angles range from 71 5 degrees to 74 5 degrees.
Forks have several key dimensions which include.
Where people get confused is with the inverse relationship between rake and trail.
Road racing bicycle forks have an offset of 40 50 mm 1 6 2 0 in.
Cane creek offers their forks in the two standard offsets 44mm and 51mm.
Fork offset or rake is a key aspect of how to alter a bikes handling.
Touring forks 45 52mm road forks 40 45mm cx forks 45mm.
As rake increases trail.
So most shallow angle bikes have plenty of fork offset to compensate.
It is the difference between the fork rake or offset and the steering axis.
This is what really influences how a bike will react to rider input.
Mrp s long travel 27 5 inch forks go down to 39mm and also come in a 44mm offset.
Generally speaking with a proper fork rake to yield a trail from 55 to 60 mm of trail the head angles in this range are fairly stable at high speeds.
In bicycles fork offset is also called fork rake.
Offset length width steerer tube length and steerer tube diameter.
Things move fast in the world of bicycle engineering and the fork offset conversation has grown tremendously over the past few years.
Let s talk about trail to understand the rest.
The product of the head tube angle and the fork rake is the trail.
Fork rake and offset.
Trail is a key determining factor for how a bike handles.
To understand fork rake imagine a straight line continuing from the centre of the fork s steerer tube all the way to the ground.
Generally less rake will shorten the wheelbase and result in more nervous handling a characteristic often sought by race riders battling.
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Fork rake or fork offset is a key factor in the handling of a bike.
It is unhelpful however to consider the angle of the headtube in isolation.
