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This has probably been done before..
Ive just been reading [url= https://dirtmountainbike.com/bike-reviews/trail-enduro-bikes/specialized-enduro-29-six-ways-three-wheels-sizes.html ]this[/url]
and it seems to open up a lot of possibilities of which id like to try a few. Id like to know whether it works in a large frame.
Fitted ok in mine. Specialized are reluctant to sell the link now though as they don't recommend it.
What size frame is yours and did you get the Ohlins shock?
If you want to buy the link Spesh ask you for your frame number... I don't expect them to honour any warranty issues once you buy the link.... they might but I suspect they won't.
Putting the 650b clevis link on will bring your eye to eye measurement down by around 6mm.
This will slacken your HA by approximately 1.5 degrees but remember it also slackens the SA by the same amount, this effects the pedalling etc and the reach.
There are a lot of reports of the seatstay brace hitting the seat tube but this tends to depend on frame size and shock.
One of the things not mentioned in the article is the effect that fitting the 650b clevis has on the shock curve. The shock will become slightly less active around the sag point and then become less progressive/more linear towards the end of the stroke.... something to bare in mind.
I am currently awaiting a 650b clevis to fit to my 29er medium with CCDBAcs, I intend to run it with an offset shock bushing rotated to steepen it up so i'll reduce the 6mm difference down to 4mm, I'm hoping this will take around .8 degree off the angles and lower the bb by around 8mm. This should mean a simple saddle move on the rails looks after the climbing that I like and yet make the bike a little more capable on the steep descents etc. I am hoping this will also ensure the seat stay brace doesn't hit the seat tube! The shock is due a service so once i've ridden it for a bit i'll send it off and maybe get another volume spacer put in.
Will pop up how it's going as the experiment progresses.
@ Mbnut. I've a medium E29 also and currently have an offset bushing in but fitted as it's intended but feel the bike needs to be slacker. Im also running a 30mm rise bar and not the 30 or 40 mm drop as per the article. I find the bike more manoeuvrable with a rear weight bias.
Does the clevis not cause any ptoblems with medium frame.? Mine's a 2014 and came with the ctd shock..
Mine is a large carbon frame and the seat stay bridge had clearance with it fully bottomed out. I imagine the Ali frame would have more clearance again. I didn't check if the chainstay collided with the rear of the seat tube/bb area. I've since noticed some marks in that area but they could be from something else.
The bike felt much better with the link. Felt quite similar in terms of position to the 650 enduro.
I ran the link with a monarch. The ohlins is the same length as the monarch.
I have ran an ohlins coil on the bike as my local shop have a demo shock. The performance of the shock is unbelievable. Even climbing with no lock out was pretty good. Downhill is as you would expect. Better than the double barrel coil on my dh bike.
Ok, so I set the bike up and rode it at the weekend.
I put the 650b clevis on and checked for clearance with the seat stay bridge, it cleared but was tight but it did clear... might give it a go like this but really can't afford a new frame so will see how it goes.
I then put the offset bushing in but set up to steepen things rather than further slacken.
Clearance is good.
Using a somewhat dodgy phone app I measured the angles etc. The SA is on the actual seat post rather than an effective SA.BB reading is the height from the ground to the centre of the BB.
As standard;
HA - 67.7
SA - 69.8
BB - 345mm
With 650b clevis and offset set to steepen - shortening the eye to eye by 4mm;
HA - 67.1
SA - 69.2
BB - 335mm
I had expected a great difference in the HA and SA and must confess to being a touch disappointed. The 10mm drop in the BB is very welcome though.
So how did it ride... well firstly I only had to tweak my saddle position to maintain my position in relation to the BB.
Shock was set up exactly as before.
The main thing that was noticeable was the drop in the BB height. Cornering was both easier and quicker with an added dose of stability. The slacker angles were there but did not seem to make a significant difference, though the bike 'felt' better overall with less of a tendency to try and tuck under when on very steep turns.
As with all things mtb, many different aspects come together to give an overall sense of how a bike rides, for me this has been a good move.
I may play with running the bike without the offset to see how that feels and if it will cause a problem... then I may speak to the good people down at www.offsetbushings.com and have a 1mm bush made to give me some peace
of mind.