I have some 9mm quick release wheels (2009 crossmax) that I want to use on my Cove Stiffee, the trouble is I have Marzocchi Shiver SC’s with the 20mm bolt through axle.
I had a think the other day and designed a pair of inserts to allow me to use a standard 9mm axle on a 20mm fork. I then remembered last night how flexi the shivers are due to being an upside down fork with no intermediate brace and am concerned that by removing the 20mm axle that I may be putting too much stress on the quick release.
Can anyone offer any advice?
Finances won’t allow me to change the forks or the wheels at the moment so it’s either this route or put the crossmax back on my giant trance and put my new hope pro2 evo / 819’s on the cove as originally intended. I would rather keep the hope/mavics on the giant though as I prefer them to the crossmax after using them for a couple of weeks.
Cheers
Andy
[i]Can anyone offer any advice?[/i]
don't do it.
All the strength in the lower legs is via the 20mm axle.
This ^. The only thing holding the fork legs together is the 20mm axle and even then, SCs weren't the stiffest of forks! They are ace though but you idea of a 9mm conversion... no, no, no. Not with those forks (I believe there are people in sheds already making them too but obviously intended for 'normal' forks).
I wouldn't do it.
Can the Crossmax be converted to 20mm? A quick google has confused me but it seems some models/years of Crossmax can be converted and others can't.
If you are looking down the route of making adapters for the forks could you not look at the option of some custom end caps, new spacer tube and specing some bearings to suit?
Take a look at how your pro2's work - 20mm adapters held in place with C-clips bearings that sit on the 20mm axle then a 20mm centre tube supporting the inside of the bearing and onto the inside of the hub with an o-ring.
Get a cheap pair of verner calipers and you thinking cap on.
buy these for £70;
[url= http://singletrackworld.com/forum/topic/fs-wheelset-20mm-front-qr-rear ]http://singletrackworld.com/forum/topic/fs-wheelset-20mm-front-qr-rear[/url]
and sell your mavics for more than £70.
thanks for the advice.
As mentioned they certainly are not the stiffest forks.
I think ill give the adapters a miss and put them back on my giant. bit gutted as i really like the way the giant rides with the hope/mavics
Anyone want to buy a pair of crossmax st's the rear has just had a new rim and all new spokes!
higgo. i think its only the 2012 crossmax that is convertible.
i had a google and found some people were making them, why do all my great ideas come too late?
Thanks again
rust mac. that was another avenue i was considering. i'm a 3d designer so i have the facilities to design the parts and have a friend who has a machine shop to make them. my only concern is the inside diameter of the hub. will it be big enough to put a 20mm axle through or if not can i come up with something large enough to thread couple together in the middle.
My prefered option would be to sell the crossmax and get some more hope/mavics with the adaptable hub but i'm not sure how much they will fetch.
if you take a look on the mavic-tech website you should be able to find some info on the wheels username is mavic-com password is dealer. I had a quick look buit not knowing your exact wheels makes it impossible to figure out if it would work.
Have a look at the size of the bearings, this will be the key limiting factor.
My idea would be take the bearing size or model and put it into simply bearings bearing finder to get the dimentions then go to hope-techs web site to find the size of bearing they use, get the ID from hope and the OD from mavic and see if there is a bearing that is that size.
If there is space for a bearing there should be space for a centre tube if you follow a design similar to the hope one then you would just need to figure out end caps.