Taller crown race?

[peterk]

I've replaced the fork on my 2020 Stance-e with a Fox Factory 36 which BTW feels much better than the OEM Suntour. The problem is that both the air cap and the compression dial make contact with the rubber battery bumper at the top of the down tube when the handlebar is turned sharply.
Does a deeper (taller?) crown race or some sort of spacer exist that would lower the fork (tapered) in the headset to provide more space?

Thanks.

 

[RickBullotta]

You can get one for your exact specs from MTB tools:

Extended Crown Race for Fat Bike Suspension Fork Clearance | MTB Tools

This is an extended aluminum crown race (baseplate) with the common 45 degree angle for 1.5″ lower cartridge type sealed headset bearings. Intended to replace the stock crown race and provide clearance for suspension fork installation on Fat Bike frames. We manufacture them to order within 5mm...

mtbtools.com

 

[peterk]

You can get one for your exact specs from MTB tools:

Extended Crown Race for Fat Bike Suspension Fork Clearance | MTB Tools

This is an extended aluminum crown race (baseplate) with the common 45 degree angle for 1.5″ lower cartridge type sealed headset bearings. Intended to replace the stock crown race and provide clearance for suspension fork installation on Fat Bike frames. We manufacture them to order within 5mm...

mtbtools.com

I just took a look and I'll need to drop the fork 20mm to get enough clearance between the rubber bumper and the stantion caps on the fork crown. Surely adding 20mm to the effective fork length.will screw up the handling. Thoughts?

 

[Husky430]

Do you really need to turn it more than when it hits the bump stop? Imagine if you had triple clamp forks it would have even less movement from side to side and more travel. Just the fact that you have a better ride should be enough of an improvement, even if you loose a little 'Lock', unless your doing trials on your bike that is.

 

[peterk]

Do you really need to turn it more than when it hits the bump stop? Imagine if you had triple clamp forks it would have even less movement from side to side and more travel. Just the fact that you have a better ride should be enough of an improvement, even if you loose a little 'Lock', unless your doing trials on your bike that is.

I was thinking the same. The only time there would be significant contact is in a crash. Annoyingly, even slight contact with the compression knob causes a click.

 

[Husky430]

Hadn't thought of the fact that contact is changing the rebound or compression settings. Would it be possible to 'add' some rubber to the block so that the contact point would be on the crown itself and not the clickers?

 

[peterk]

Hadn't thought of the fact that contact is changing the rebound or compression settings. Would it be possible to 'add' some rubber to the block so that the contact point would be on the crown itself and not the clickers?

Good thought. I'll have to look at that possibility. But the bars do have to be turned a lot to make contact.

 

[Alexbn921]

I highly advise against adding 20mm to the lower crown race. The forces on the fork and headtube would be much higher and adding 20mm to the fork length is a lot.

 

[peterk]

I highly advise against adding 20mm to the lower crown race. The forces on the fork and headtube would be much higher and adding 20mm to the fork length is a lot.

I am pretty sure I'll leave it the way it is. I don't like changing the geometry that much either. The Fox fork is already 10mm longer than the Suntour OEM.

Thanks all for your thoughts.

 

[RickBullotta]

I highly advise against adding 20mm to the lower crown race. The forces on the fork and headtube would be much higher and adding 20mm to the fork length is a lot.

A crack or notch in the frame would be the worst outcome though if he does nothing. Hopefully it's only interfering with the rubber bumper.

 

[peterk]

A crack or notch in the frame would be the worst outcome though if he does nothing. Hopefully it's only interfering with the rubber bumper.

The only contact point is the rubber bumper.