|
#1
|
|||
|
|||
Advice on setting crown race
Need advice on setting a crown race - carbon fork and steerer, 1 1/8, Chris King crown race and I'm using the Park tool. The crown race is apx. 1 mm from bottoming out and I cannot drive it down any further. I've used Tri-Flow to hopefully help, no luck. I've whacked the tool until my arm gives out, no luck. I also tried using a heat gun hoping the crown race would expand enough, no luck. However, I was reluctant to hold the heat gun on the area too long for fear of damaging the carbon.
I've seated scores of crown races, never have had one like this. A lot of the energy from the mallet is taken up by my holding the fork. I realized I cannot rest the end of the fork on the dropouts on the floor for fear of damaging the dropouts. I'm thinking of using a 3/4" or larger pipe, padded, to rest the fork crown on to solidly support the fork while I wack the tool. In other words, the fork would straddle the pipe which would be horizontal. But obviously this also might damaged the fork. Advice? Suggestions? Last edited by Clancy; 03-23-2017 at 05:51 PM. |
#2
|
|||
|
|||
King makes a part that you are to place on the crown race and then tap that part to avoid damaging the race. Please get that tool before you damage the crown race.
__________________
No signature |
#3
|
||||
|
||||
I've used a fork mount to hold the fork. I dunno if that's the right way or not.
|
#4
|
|||
|
|||
Piece of PVC pipe. Place pipe on ground, hold fork in other end. While holding fork, tap other end of the pipe on the ground. Crown race will go right on.
|
#5
|
|||
|
|||
Crown Race
You have the King adaptor for pressing crown races, correct?
If not, you can easily damage a crown race by pounding it on in the manner that you have described. I suggest having the King tool and using grease on the inside of the race- Then you can pound away and not worry about damage. |
#6
|
||||
|
||||
It may be important to think about the carbon fork, perhaps the fit is tight enough to damage the carbon?
Use something like this to secure the fork while hammering https://deltacycle.com/bike-hitch-pro I think it may be preferable to use headsets that have split races on carbon forks.
__________________
please don't take anything I say personally, I am an idiot. |
#7
|
||||
|
||||
Sometimes the crown is to wide for the crown race. Sanding the inside of the crown race with a Dremel usually helps it fit. If it does not go on after pounding the snot out of it, then this is usually the issue. Carbon forks that do not have an aluminum sleeve moulded in to act as the crown are often slightly out of spec.
__________________
Cheers...Daryl Life is too important to be taken seriously |
#8
|
|||
|
|||
Depending on the brand, I believe some makes such as Chris King offer oversized crown races to fit such applications. It sounds like your fork was not built to spec. Did the fork previously have a crown race on it? Have you measured it with a vernier caliper? Carbon forks aren't meant to be sanded to fit and I'd be leery of that approach.
__________________
http://hubbardpark.blogspot.com/ |
#9
|
|||
|
|||
Slam harder.
|
#10
|
||||
|
||||
hold up.
don't let the fork take the force. i use a pvc pipe but i think the park tool works the same way. flip the entire setup upside down. then slam that puppy into your garage floor. your fork tips should be facing the ceiling while doing this. fyi, i've set a few really tight races in the past and realized that a lot of my effort was being wasted trying not to damage the fork itself. upside down method works and a little grease on the inside of the race always helps |
#11
|
||||
|
||||
Quote:
__________________
Chisholm's Custom Wheels Qui Si Parla Campagnolo |
#12
|
|||
|
|||
Don't know if it's been mentioned, but the easiest way is to just cut a slot in the crown race, makes fitting much easier.
|
#13
|
|||
|
|||
Quote:
Super easy, great trick. Going to remember this one. Thanks |
#14
|
|||
|
|||
#15
|
|||
|
|||
I am using the correct Park tool, CRS-1, which is a drift that you hit the top with to drift down the crown race. It's the proper tool.
It's the correct race for the steerer, extremely tight fit. It was greased. I'm wonder if I can support the fork by bracing it by the underside of the fork crown, resting it on a padded structure that would be the same shape - curve - of the fork crown. By supporting it only by holding it, no matter how firmly, isn't very effective. Too much energy is absorbed by my hand rather than going to the crown race. |
|
|