Rail (750Wh) 2022 Trek Rail 9.8 & 9.9 Carbon Shock Bolts

Rob Rides EMTB

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Jan 14, 2018
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Heads up, to anyone wanting to install a regular metric shock to the 2022 9.8 or 9.9 Rail, they use a different shock bolt to the prior year models.

Its listed below, but you'll need the 5258210 lower and 5258209 upper bolts. I think these are the exact bolts that the new Slash uses too.

Screenshot 2021-12-17 at 18.00.13.png
 

Like a Boss

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Feb 25, 2020
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USA
2021 Slash indicates a different part number for the upper shock axle, 599898. Lower shock axle for 2021 Slash and 2022 Rail indicates the same part number.
2020 Rail has same upper shock axle, 599898, but different lower shock axle, 599900.

It's confusing.

I wonder if the difference is the bolt head at 18.5 mm vs 16.5 mm. I don't know.
 

jacob80

Member
Apr 14, 2022
28
12
Omaha, NE
I need these bolts but these are extremely expensive. Has anyone found an equivalent third party solution? McMaster carr perhaps?
 

Like a Boss

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Feb 25, 2020
81
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USA
It’s battle out there with pricing. I ended up buying the upper shock mounts and lower shock mounts. There were not extremely expensive, but they did seem excessively expensive. I was angry about it but I bought them, mounted a Fox X2 air shock and the bike rides significantly better than with the factory 2020 reAktiv shock. Now I don’t even think about it.
 

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