1. ## Help with angles please - especially HA

I've got a X5 2004 and i am currently running pikes and fox float on 6" rockers. The bike has quite a high BB (around 14"+). I know the angles changed from 70 deg in 2004 to 68.6deg from 2005 onward so i have not got a clue what my HA is.

I have also read a couple of notes that say that each 20mm in fork (axle to crown length) is about 1 deg but elswhere i have seen 25mm = 1 deg.

Does anybody have the definitive rule for each mm change in AC length vs HA change?

I can have a gues at my HA but i am unsure what the change in rockers ie from 5" to 6" has done to the BB height and if this has affected the HA of the bike.

just as a starter the 2004 angles are based on a AC of 478mm
the 2005 onward 505mm and the pike is a 518mm (at 140mm)

cheers for any help in advance

Dave

2. The rule that I've always gone by is 10mm in A-C is equivalent to approximately .5 deg in HA. Now I could be wrong on this, so maybe someone else more knowledgeable will chime in here too. As far as what the 6" rockers do to the geometry of your X5, I have no idea. I've never seen or read anything about it.

3. Go buy one of these for \$12.

Takes the guessing out.

D.

4. Originally Posted by D-Rock
Go buy one of these for \$12.

Takes the guessing out.

D.
That won't work the frame is alloy

5. Originally Posted by crux
That won't work the frame is alloy
You can hold it, with your hand.

6. Originally Posted by Ventanarama
You can hold it, with your hand.
Exactly.

D.

7. ## 48" level

While you are at the store pick up a framing level, so you can find a section of floor about 15" from a wall that is actually level, cheap ones are less than \$15. Anyone with any brand of bike that messes with fork length and different tire diameters and linkage and shock lengths should spend a little more to know what they did and put that together with how it feels on the trail.

DT

8. thanks for the reply lads but over here in Great Britain i cannot find one of those angle finders.

and why 15" away from a wall?

9. Originally Posted by vortexracing
thanks for the reply lads but over here in Great Britain i cannot find one of those angle finders.

and why 15" away from a wall?
minimizes the effect of gravitational force on the angle finder

#### Posting Permissions

• You may not post new threads
• You may not post replies
• You may not post attachments
• You may not edit your posts
•