FM1001 / FM1156 - 135mm frame

[brunev]

Good news that you managed with the lower bearings. Not sure why the difference on the rocker bearings, did you notice the flange on the enduro bearings being thicker at all? Were they like the pic I uploaded?

[Neb]

Good news that you managed with the lower bearings. Not sure why the difference on the rocker bearings, did you notice the flange on the enduro bearings being thicker at all? Were they like the pic I uploaded?

I've got the bearings in the rocker in fine, but the lower bearings in the main pivot don't quite go in far enough to press against the internal tube the axle runs through, so I'm thinking the Enduro bearings are the same as yours and 0.5mm too thick.

I'll compare with the new bearings when they arrive this week. I'm tempted to shave 0.5mm off the spacers on the lower pivot so that can use Enduro bearings. But since the original bearings arrive this week I'll use them this time. I'll clean out the grease and use a heavy waterproof grease before fitting.

[bossman302]

I'll clean out the grease and use a heavy waterproof grease before fitting.

I degrease all the bearings from my kit and put in a high quality grease. Not sure if it was worth the effort since these are just cheap generic bearings but we shall see.

[Neb]

I degrease all the bearings from my kit and put in a high quality grease. Not sure if it was worth the effort since these are just cheap generic bearings but we shall see.

On first look the grease didn't look great, but it's really tenacious stuff! The fill wasn't too bad for OEM bearings either. One thing I did notice was how the factory grease wasn't well spread through the bearing, so definitely worth spinning each bearing a few times before installing in the frame or there will be bearings not covered by grease.

Old vs new

[jever98]

Has anybody tried 3d- printing a downtube protector? Sounds like a fun way to get something that fits well.

[helmat]

Another hint for everyone unhappy with the shock bolt. I really disliked the silver screws so I got myself a Titanium axle that came with black bolts but they were too small in diameter and I couldn't find ones that fit better.
I have now ordered the shock bolt kit for a YT Capra and while the axle itself is too long it comes with 2 bolts that can be used with the titanium axle. These bolts perfectly fit the openings on the 1001 rocker link.
Can be ordered here:
https://www.yt-industries.com/products/parts/capra/mk2-2018-2021/215/shock-bolt-set-capra-mk2/

[jever98]

@helmat: where did you find a titanium axle? I have been hunting around on aliexpress and webshops, but can only find 33mm long axles.

On a side note: has anyone tried the 40mm long steel axles available on aliexpress? they are very cheap, wondering if they are any better than the stock ones.

[FullCarbonAlchemist]

You can get a titanium 8x40 “Transition” shock bolt that fits from BetterBolts. I think they normally offer it as part of a kit for a specific model of Transition but you can custom order it separately from them by email.

[Neb]

I had to order the full hardware kit from carbonda and I noticed that the bolt is now much better than the original bolt that came with the bike. In addition the headset now seems to fit properly and doesn't need spacers underneath the top cap.

Seems that some of the hardware shortfalls have now been addressed

[jever98]

Has anyone had problems with a undersized shock mounting interface? I bought for 8x30mm, but the measured size is closer to 29mm. I guess I'll have to file down the spacers...

[jever98]

Another addition to the FM1001 builds: a size M for my wife, with XT groupset, Cane Creek Helm fork, OneUp dropper, hand built wheels with Carbonbeam rims. 13.7kg ready to ride with heavy tires and a pretty heavy fork - not super light. Her birthday is in 2 weeks, I hope she will like the surprise :-D.

[filipes]

Some more review https://enduro-mtb.com/en/detrail-stig-135-test/

I agree with the negative points of the review, personally I increased fork to 150 and have tons for 3d printed spacers and custom shim stack to boost compression damping....  (both providing more "support" for the rear).

[filipes]

And this interesting https://www.detrailbikes.com/berg-155/
Looks like they put different rocker (Alu instead of carbon?) to squeeze more travel and increase progressivity of our topic. This is exactly what I want, may be not up to 155. Interesting approach instead of using FM1002... 

[jever98]

Interesting, thanks for sharing.

Isn't the support of the suspension a lot related to the shock tune? If I recall correctly, the FM1001 doesn't have an unusual leverage curve?

[filipes]

As per my info, FM1001 has flat and quite "low" leverage curve. It needs air shock with a lot of progressivity (small positive chamber) and IMHO and above average low speed compression damping. Guys at Detrail are clearly aware -> they put small chamber & highly damped Ohlins TTX1 on their most expensive build. Also, for their "Berg" model they designed & created new rocker link and market its 30% progressivity (clearly a design objective to remedy problem of zero progressivity of the origianal).