1.8inch fork steerer…. Anyway of getting back to 1.5inch ? [Edit - Yes!]
- Thread starter barney96
- Start date
Acros is the only option I know of ATM
Hi Barney, do you have a link to the part? Cheers!
- Thread starter
- #6
gabelkonus 1.5" für zs66 & is60
The team at Acros are great, very helpful. Fast postage too. No Patron as yet as delayed to January so not had chance to install.
The team at Acros are great, very helpful. Fast postage too. No Patron as yet as delayed to January so not had chance to install.
I'm just Scottish bro.
Were just not all fairies up here
Were just not all fairies up here
Did a test run, got a bike that uses that 1.8 to 1.5 crown race and fit perfect on a Fox 38 1.5 steerer to a 1.8 headtube
Came stock on the 2022 Giant Reign E. I ordered that Acros one you linked so I have my own. Be here soon.
I used the above link and bought the crown race from Acros. It was $50 USD to arrive at my place in the USA. When I put my 1.8 bearing from my 2022 Trek Rail 9.8 XT onto it, I found the diameter inside the crown race was too small and the external diameter of the race would only extend midway on the bearing. I didn't feel comfortable installing a crown race that did not fit snugly on the internal dimension nor did it give the bearing a full platform to sit on, so it is in my toolbox for now. . .
I called FSA USA and they have a crown race that is a 1.8" and reduces to 1.5" (part number#H6164). They didn't have it on their website, but the sales guy was nice to find me one and sell it. I just got it and the bearing from my Trek Rail fits snugly on it and I feel much more confident installing it on my bike. I also found a link of the same part in the UK at FSA Crown Race: SUPTAP Ebike THOK (1.8 - 1.5", H6164)
I called FSA USA and they have a crown race that is a 1.8" and reduces to 1.5" (part number#H6164). They didn't have it on their website, but the sales guy was nice to find me one and sell it. I just got it and the bearing from my Trek Rail fits snugly on it and I feel much more confident installing it on my bike. I also found a link of the same part in the UK at FSA Crown Race: SUPTAP Ebike THOK (1.8 - 1.5", H6164)
Soakinoak
Member
Hello Everyone! I went through the same ordeal. Had a $10 crown race shipped from Acros for $35 from Germany. Didn't care as long as it fits. They used a box instead of a padded envelope....but that's all spilled milk under the bridge now. Also purchased the H6164 from FSA. Just as you mentioned, the Acros crown race fits perfectly on the bearing, however only supports the inner ring of the entire bearing. The inside diameter seems a tad tight (it's 40mm tho). While the FSA crown race supports the entire width of the bearing, it doesn't seem to settle properly on the inside (the inside of the bearing with outside of the crown race. I hope this makes sense) . Sort of wobbles a bit. After comparing all 3 together, I found that the original crown race for the ZEB also wobbles, similar like the FSA. As it is a split ring, I noticed that it "clicks" into place when compressed while torquing down the top cap. I did not cut the steerer tube on the FOX yet, so I don't know hot it will behave. After working at a bike shop for a couple of years, not the Acros, nor the FSA H6164 feels like the perfect match. Am I reading too much into this issue? What's the overall experience? Please advise. Cheers!
Motohawk75
Active member
Might be worth asking @Rob Rides EMTB as im
Pretty sure he used the Acros on his new Rail / Fox 38’s with no problem……
Dwazzer
Member
Which bike did you order? I think I have the same issue...I have ordered a new Nukeproof Megawatt Comp (NO elite or factory versions available anywhere in the UK
)I want to put my Zeb Ultimates on the Megawatt but they have a 1.5' steerer and I think the Forks on the bike will be 1.8"!
alasdairfraser
New Member
For folks in the US, you can order this part through your local trek dealer. The part number is W5269810
Sorry for the delayed response and hope you were able to get this sorted. I experienced the same thing you described regarding the internal width and decided to forge ahead based on past experience with similar parts. I had to use a crown race tool with a little grease to install the FSA crown on my Fox e38 fork since there is more material due to it being reduced to a 1.5 dia. Currently I have I have approx.. 200 miles of hard riding on it in the Pacific Northwest on black trails and have not had a single creak. I just pulled the fork off to check the bearing the it is still smooth and doesn't have damage on it or the crown race. From what I can tell it fit well when torqued into place.
Thanks alasdairfraser for putting the Trek part number in this thread (The part number is W5269810)
I just checked it out at my local Trek dealer and it looks like the FSA part. I suspect they are the same part since some major bike companies use FSA for OEM components.
JohnyL
Member
Hi Soakinoak,
I’ve found the same issue with the H6164.
It doesn’t fit on the bearing properly. I’m informed by plenty it’s the right adapter. So I used a heavy duty clamp and tried to squeeze the beaing on to the race away from the bike between two wood blocks; It definitely doesn’t fit.
Can I ask what you did in the end? I have some very nice Zebs Ultimates to fit but not the adapter
.Considering the Acros part
Cheers
Just ran into this problem with my Giant Reign E+ . Steerer tube needs to be 1.8'' tapered and I've just got the new domain that comes with the 1.5'' tapered steerer tube.
If you're on the EU you're in LUCK! You can check the guys at NDtuned , they got a 1.8'' to 1.5'' Steerer tube reductor.
If you're on the EU you're in LUCK! You can check the guys at NDtuned , they got a 1.8'' to 1.5'' Steerer tube reductor.
Hi Rob are you saying I can remove the crown race from my reign 2022 and use that for a 1.5" tapered fork? I am trying to replace the zeb emtb that came stock.
Roald
New Member
I ran in to the same issue, so I ordered the acros adapter mentioned above. Unfortunately due to improper installment of the fork (I didn't hammer the starnut far enough down the steerer tube, disabling me to put proper tension on the headset.) The adapter instantly was mushed by the lower headset bearring when i took my first big jump. And as luck would have it, the link above is now not available anymore.
I really wanted to use a 1.5" fork, so I did some research and finding out.
My discoveries:
Acros has updated the adapter part to improve it's strength and discontinued the older adapter, hence the link not working anymore. They've probably done that because there were more people experiencing the problem I had with the previous version of the adapter.
The part number for the new adapter is 51.02.014-AM Directly sold by Acros or other websites. Link for the Acros website:
If your bike is equipped with an Acros IS60 bearing, this should fit. If your bike uses a different bearing, you can order the bearing that will fit on this adapter from Acros themselves. And replace the one in your bike.
If you choose the correct lower bearing, the 1.5" adapter will be included in the set so you won't need to buy it separately. The part number of the bearing with the adapter included is: 44.02.710. This is the part I ordered which looks and feels way more sturdy than the previous version.
The link for the lower bearing:
acros-components.com
If you only need the bearing as a replacement and already have the adapter, you can order part number 44.02.700.
Link for the bearing without the adapter:
acros-components.com
Feel free to message me if you have any questions on this topic. After receiving the lower bearing with adapter, I was able to install a fork with 1.5" steerer in the frame with no difficulties.
I really wanted to use a 1.5" fork, so I did some research and finding out.
My discoveries:
Acros has updated the adapter part to improve it's strength and discontinued the older adapter, hence the link not working anymore. They've probably done that because there were more people experiencing the problem I had with the previous version of the adapter.
The part number for the new adapter is 51.02.014-AM Directly sold by Acros or other websites. Link for the Acros website:
If your bike is equipped with an Acros IS60 bearing, this should fit. If your bike uses a different bearing, you can order the bearing that will fit on this adapter from Acros themselves. And replace the one in your bike.
If you choose the correct lower bearing, the 1.5" adapter will be included in the set so you won't need to buy it separately. The part number of the bearing with the adapter included is: 44.02.710. This is the part I ordered which looks and feels way more sturdy than the previous version.
The link for the lower bearing:
zs66 headset lower part
Semi-integrated headset (zs) for frames with 66mm head tube at the bottom. In our zs66-headset-bottom-part, the combination of angular contact ball bearings and well thought-out sealings ensure durability with minimum maintenance and...
acros-components.com
If you only need the bearing as a replacement and already have the adapter, you can order part number 44.02.700.
Link for the bearing without the adapter:
zs66 headset lower part
Semi-integrated headset (zs) for frames with 66mm head tube at the bottom. In our zs66-headset-bottom-part, the combination of angular contact ball bearings and well thought-out sealings ensure durability with minimum maintenance and...
acros-components.com
Feel free to message me if you have any questions on this topic. After receiving the lower bearing with adapter, I was able to install a fork with 1.5" steerer in the frame with no difficulties.
I picked this up from trek in usa Trek 2022 Rail 9.9 / 9.8 29 1.8˝ to 1.5˝ Headset Reducer Crown - Trek Bikes
seemed to fit my 1.5" steerer tube and mated with lower bearing frame I have not tried it out as it is on backup fork. Still using my oem zeb with 1.8" steerer tube
seemed to fit my 1.5" steerer tube and mated with lower bearing frame I have not tried it out as it is on backup fork. Still using my oem zeb with 1.8" steerer tube
Yeah, that can be frustrating. The new 1.8 headtube standard limits your options a bit. If you really want to run your Factory 38’s with the 1.5 steerer, you’ll need to check if there’s an adapter or reducer headset that lets you fit the smaller steerer into the larger headtube. Some brands do make them, but it depends on your frame and headset type. It’s not the cleanest setup, but it can work if done right. Might be worth checking with your local shop or the frame manufacturer to see what they recommend.
This is my first post. I also need assistance regarding this issue.
I recently purchased the ZS66 part from Acros.
Link: zs66 headset lower part
I have a Giant Reign E+, which has a 1.8 super tapered headtube. The fork I want to install is a Rockshox ZEB with a 1.5 tapered steer tube.
My local bike shop said the part wouldn't fit. Can someone confirm or reject whether the part would fit my bike? Thanks in advance!
I recently purchased the ZS66 part from Acros.
Link: zs66 headset lower part
I have a Giant Reign E+, which has a 1.8 super tapered headtube. The fork I want to install is a Rockshox ZEB with a 1.5 tapered steer tube.
My local bike shop said the part wouldn't fit. Can someone confirm or reject whether the part would fit my bike? Thanks in advance!
this is what you need Trek 2022 Rail 9.9 / 9.8 29 1.8˝ to 1.5˝ Headset Reducer Crown - Trek Bikes
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