Forum menu
55mm Chainline??
 

[Closed] 55mm Chainline??

Posts: 2335
Free Member
Topic starter
 
[#11690062]

So my new frame coming (Slash) is 55mm chainline

Trying to understand if my current X01 cranks are going to fit.

presume these are standard 52mm (coming off Vitus Sommet)

I will run a 30T so gives more clearance.

55mm seems a rare breed??!!


 
Posted : 19/01/2021 11:08 am
Posts: 8201
Full Member
 

55mm is achievable with raceface 30mm cranks using a different length spindle. There is a tech document on their site with the details linked from the crank models.


 
Posted : 19/01/2021 11:13 am
Posts: 2739
Full Member
 

My understanding is that you just need a zero offset chainring. Your current chainring will be 3mm giving you a 52mm chainline. Therefore zero 0mm will give you 55mm.


 
Posted : 19/01/2021 11:28 am
Posts: 2335
Free Member
Topic starter
 

ah yes - this makes sense, and hopefully don't need to order a new crank - cheers


 
Posted : 19/01/2021 11:39 am
Posts: 40432
Free Member
 

I don't know about that particular bike, but as Davros says you can get different offset chainrings if you have a direct mount SRAM crankset.

I know Superstar do 0mm, 3mm or 6mm offset rings for SRAM - and one of those is likely to be correct. They have a 20% off deal at the mo as well.


 
Posted : 19/01/2021 11:42 am
Posts: 2335
Free Member
Topic starter
 

yep just looking -
wolftooth and superstar. nice


 
Posted : 19/01/2021 11:47 am
Posts: 8201
Full Member
 

Just be careful with crank clearance on the chain stay. Does it need a 55mm chainline because the back end is wide.

Some direct mount rings you can also flip the ring over two get a wider chainline.


 
Posted : 19/01/2021 11:51 am
Posts: 40432
Free Member
 

yep just looking –
wolftooth and superstar. nice

I've found the Superstar ones last really well, FWIW.


 
Posted : 19/01/2021 11:52 am
Posts: 2335
Free Member
Topic starter
 

hmm good point - that is an important question nixie....

I suppose until I offer them will be hard to know


 
Posted : 19/01/2021 11:52 am
Posts: 2335
Free Member
Topic starter
 

https://www.bike-discount.de/en/buy/truvativ-descendant-carbon-eagle-dub-12-speed-dm-crank-30t-55mm-874708

Seen these as a backup...


 
Posted : 19/01/2021 11:55 am
Posts: 2335
Free Member
Topic starter
 

looking on the spec of the complete slash it comes with a

Size: M, M/L, L, XL
SRAM GX Eagle, DUB MTB Wide, 30T, Boost (55 mm chainline), 175 length

so as you say, maybe need it to clear the back end....


 
Posted : 19/01/2021 11:59 am
Posts: 2335
Free Member
Topic starter
 

https://absoluteblack.cc/sram-oval-bb30.html

Interesting as here Absolute Black say a superboost crank with a 0 offset ring is 55mm chainline!??


 
Posted : 20/01/2021 10:48 am