Offset bushes on a 6.6?

[deesta]

Hi all
I've been reading up on alterations that can be made to improve the 6.6 from a good bike to a great bike.
Top of my list are some offset bushes as I can make them myself because I'm a CNC machinist and I'd like to drop the BB a little and reduce the head angle.
Are any of you using them? If so do you use top and bottom, just bottom, just top? What sort of offset? Orientation?
I've never used/fitted them before so any help would be gratefully received..
Cheers
Steve

[Tkul]

hi!
I've installed offset bushing, reducing eye-to-eye by 4.9mm (200mm original length).
Changed the geo considerately for the better (except for the BB height - that personally I don't find it has a negative aspect!). find it over here:


https://sites.google.com/site/bttpor...ometrie_change


PS: if you look on the forum, you'll find some added info.

[deesta]

Hi Tkul
Thanks, very useful. I've made my bushes now (one set with 2.5mm, one with 3mm offset). The shock (5th Element Coil) is off to TF Tuned for an upgrade service tomorrow so will wait til it gets back to fit the new bushes. Will do all the pre-install measurements then measure again after to see what's changed. Test ride will be next Thursday so will report back after that..
Steve

[deesta]

I've just got my shock back from TF and have fitted my home made off-set bushes. Seems to have made a big impact on geometry :-)

Before:
Head angle = 69 degrees
BB height = 14.37"

After:
Head Angle = 67 degrees
BB height = 13.85"

So I've slackened the head angle by 2 degrees and dropped the BB height by 0.5". Will get out on the trails asap to see what it's done to the handling but, from what I've read, I'm hopeful for some good improvements...

[retrofred]

Love to hear how they changed the feel of the ride. Would like try something to this extent on my uzzi.

Sent from my SGH-T889 using Tapatalk 2

[deesta]

Love to hear how they changed the feel of the ride. Would like try something to this extent on my uzzi.

If the sizes are the same I have a couple of spare sets I'd be willing to sell....PM me if you're interested

[Tkul]

I've just got my shock back from TF and have fitted my home made off-set bushes. Seems to have made a big impact on geometry :-)

Before:
Head angle = 69 degrees
BB height = 14.37"

After:
Head Angle = 67 degrees
BB height = 13.85"

So I've slackened the head angle by 2 degrees and dropped the BB height by 0.5". Will get out on the trails asap to see what it's done to the handling but, from what I've read, I'm hopeful for some good improvements...

Hi Deesta!
Just curious - how did you measure the angles? and fork you have?
I'm asking since the original geo for this bike was something like:

Axle crown - 510mm
HA - 68.5º
SA - 73º
BB height - 350mm
Axle Lenght - 1097.9mm

[Tkul]

Love to hear how they changed the feel of the ride. Would like try something to this extent on my uzzi.

Sent from my SGH-T889 using Tapatalk 2

Hi! Try some and you'll find out if you like it.
Basically I liked the more relaxed HA!

[deesta]

Hi Deesta!
Just curious - how did you measure the angles? and fork you have?
I'm asking since the original geo for this bike was something like:

Axle crown - 510mm
HA - 68.5º
SA - 73º
BB height - 350mm
Axle Lenght - 1097.9mm

Hey,
Not the most exact method TBH. I've got a protractor app on my phone which I used for the angles and used a steel rule to measure BB height. Fork is a 150mm Float RLC

[Tkul]

Axle to corwn of Fox 32 - 150mm = 520mm
Thumb rule - for each 20/25mm on the Axle to Crown corresponds 1º in angles.
So if you have +10 it should sit +/-0.5º more relaxed to original data.
HA - 68º

If you stick to that fork, and adding offset bushings, you'll lower even more the BB. Going this way will depend on the trails you ride (for me it's a no-no situation since when I go with my Rize, I hit some rocks and can imagine with a bike with more sag..... ).
Offset bushes are cheap to try, and if you like it, maintain if not, try to sell to your neighbors!

Also you could try a 190x50 (more extreme move) if you have one available.