Lower headset 1.5 -> 1.8" conversion

[Notsopromtber]

Did a mistake and bought a fork with 1.8" steerer tube. Trek Rail takes 1.5" steerer tube inside. I couldn´t find conversion cups in market so I designed and builded conversion cup myself. This lifts front 13mm but hey, it works! Here are the results:

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Great Job!

Looks like I"m new to the "purchased the wrong fork club". When the fork was labelled "For EMTB" I didn't realize it really meant 1.8" taper...

Do you have a CAD or STL file that you can share?

 

[Norty]

My Son and I have Scott Strike eRide 930 bikes. Came from dealer with Marzocchi Z2 Air 140mm Forks, 34mm stantions and 1.50 inch head tube. After several years of ridding, we are now replacing our OEM forks with RockShox ZEB Ultimate 160mm, 38mm stantions, Boost, RC2, DebonAir, AirWiz, 1.8 inch head tube. Attached are images of the crown race and bearing adapter that I designed and machined. We are using Specialized bearing GPBHS454556865 56.8mm OD x 47.8mm ID x 6.5mm height with 45° angular contact surfaces.
Images display assembly... from Image:
1) Fork Crown "simulation" displayed as a solid
2) Crown Race included as a solid
3) Bearing included as a solid
4) 1.80 Adapter included as a solid

 

[hacieff.7bike]

PM me and I’ll send you the cat file

Hello Brother, Can you send me to The file?

 

[ChrisB180]

Did a mistake and bought a fork with 1.8" steerer tube. Trek Rail takes 1.5" steerer tube inside. I couldn´t find conversion cups in market so I designed and builded conversion cup myself. This lifts front 13mm but hey, it works! Here are the results:

View attachment 139026View attachment 139027View attachment 139028View attachment 139029View attachment 139030View attachment 139031

Please can you send me the CAD file . I can't PM you as I'm a new member. Thanks in advance!

 

[ChrisB180]

Worked a treat

 

[Ghostrider.1127]

Actually here the correct reducer from 1,5 to1,8 Crown Race Reducer 1.8R ( ketty the tank , came with 1,8 )