Other 1.8” Crown Race

RichP

Member
Jul 15, 2018
35
33
Chesterfield
Good morning all,

Prior to posting this new thread I’ve trawled through multiple other looking for an answer to this simple question.

I own a 2024 Rail 9.5 and bought a pre owned Zeb fork as an upgrade, but when I came to swap over the original fork crown race I found it was too small to fit over the steerer.

Spec from Trek Website:
OCLV Mountain Carbon main frame, 1.8'' lower head tube.

On further investigation I noticed that the original fork steerer diameter was 1.5” and the crown race had a larger land that effectively reducing the inner diameter and converting the 1.5” steerer to accommodate a 1.8” bearing. All very confusing and annoying as the Bike Spec states it has a 1.8” bottom steerer bearing, and so you would have thought the fork would also have a 1.8” crown race.

So naturally I’ve search the Interweb for a replacement and have only found one on the Trek Website, trouble is they have no stock.


Does anyone have an idea where I can find one of these as currently I can’t fit the new shock.

Thanks
 

#lazy

E*POWAH BOSS
Oct 1, 2019
1,382
1,506
Surrey
I got a trek bigger zeb fork but I’ve put a 27.5 lower on it , easy to swap though ……yours for £20 👍
 

RichP

Member
Jul 15, 2018
35
33
Chesterfield
I got a trek bigger zeb fork but I’ve put a 27.5 lower on it , easy to swap though ……yours for £20 👍
Sorry pal, no idea what you mean…are you offering me a 27.5” compatible Zeb fork with a 1.8” lower tapered steerer diameter? Does the fork have a 1.8” crown race attached? If not I’m in the same situation, but with a fork that needs modification back to 29er?

Can you elaborate please?
 

#lazy

E*POWAH BOSS
Oct 1, 2019
1,382
1,506
Surrey
I bought a 29 zeb fork but the seller forgot to mention it’s only compatible with the trek fatter 1.8 crown and refused a refund stating I didn’t ask , so I used the 29 lowers on my 27.5 crown and so have a spare Trek 1.8 tapered fork with 27.5 lowers which are completely effing useless to anyone as Trek don’t make 27.5 bike anymore !
If it confused you , that’s exactly what I felt like for weeks trying get it sorted out 😂😂
Tbh you can have them for free as I’d be glad to get them outta my life 🤪
 

RichP

Member
Jul 15, 2018
35
33
Chesterfield
I bought a 29 zeb fork but the seller forgot to mention it’s only compatible with the trek fatter 1.8 crown and refused a refund stating I didn’t ask , so I used the 29 lowers on my 27.5 crown and so have a spare Trek 1.8 tapered fork with 27.5 lowers which are completely effing useless to anyone as Trek don’t make 27.5 bike anymore !
If it confused you , that’s exactly what I felt like for weeks trying get it sorted out 😂😂
Tbh you can have them for free as I’d be glad to get them outta my life 🤪
 

RichP

Member
Jul 15, 2018
35
33
Chesterfield
#lazy…I feel your pain mate. That’s exactly what happened to me! But unless the fork has a 1.8” crown race fitted on the steerer I’m buggered because my old forks had a 1.5” OD on the bottom steerer with a 1.5” to 1.8” converter crown race so that they fit in the oversize Trek head tube. I need a 1.8” crown race and can’t find one anywhere!

This specifically

 

RichP

Member
Jul 15, 2018
35
33
Chesterfield
#lazy…I feel your pain mate. That’s exactly what happened to me! But unless the fork has a 1.8” crown race fitted on the steerer I’m buggered because my old forks had a 1.5” OD on the bottom steerer with a 1.5” to 1.8” converter crown race so that they fit in the oversize Trek head tube. I need a 1.8” crown race and can’t find one anywhere!

This specifically

 

#lazy

E*POWAH BOSS
Oct 1, 2019
1,382
1,506
Surrey
Oh well , I put it at the back of shed and forgot all about it until now and it’s winding me up again 😂
It didn’t come with the crown race so can’t help you 👍
 

Jackware

Fat-tyred Freakazoid
Subscriber
Oct 30, 2018
1,972
2,154
Lancashire
Would this solve it?

 
Last edited:

RichP

Member
Jul 15, 2018
35
33
Chesterfield
Would this solve it?

I can’t be sure…the title says 1.8”, but the description says 1 1/8”. I might give them a call and ask. Thanks for taking the time to try and help out though.

Regards
 

Jackware

Fat-tyred Freakazoid
Subscriber
Oct 30, 2018
1,972
2,154
Lancashire
I can’t be sure…the title says 1.8”, but the description says 1 1/8”. I might give them a call and ask. Thanks for taking the time to try and help out though.

Regards
No problem, whenever I see a post where someone can't find an item I take the challenge 😁
The measurement shown, 45.8mm, equates to 1.8" not 1 1/8" so figures crossed.
 

RichP

Member
Jul 15, 2018
35
33
Chesterfield
No problem, whenever I see a post where someone can't find an item I take the challenge 😁
The measurement shown, 45.8mm, equates to 1.8" not 1 1/8" so figures crossed.
That’s what I thought!

IMG_4548.jpeg
 

jaumebtt

Member
Nov 30, 2022
7
1
spain
Good morning all,

Prior to posting this new thread I’ve trawled through multiple other looking for an answer to this simple question.

I own a 2024 Rail 9.5 and bought a pre owned Zeb fork as an upgrade, but when I came to swap over the original fork crown race I found it was too small to fit over the steerer.

Spec from Trek Website:
OCLV Mountain Carbon main frame, 1.8'' lower head tube.

On further investigation I noticed that the original fork steerer diameter was 1.5” and the crown race had a larger land that effectively reducing the inner diameter and converting the 1.5” steerer to accommodate a 1.8” bearing. All very confusing and annoying as the Bike Spec states it has a 1.8” bottom steerer bearing, and so you would have thought the fork would also have a 1.8” crown race.

So naturally I’ve search the Interweb for a replacement and have only found one on the Trek Website, trouble is they have no stock.


Does anyone have an idea where I can find one of these as currently I can’t fit the new shock.

Thanks
fsa-crown-race-1-8-to-1-5-reducer
 

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