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Hub classification confusion - MTB vs RB?

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Hub classification confusion - MTB vs RB?

Old 03-03-17, 11:49 AM
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jeffrbake
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Hub classification confusion - MTB vs RB?

New to wheel building, trying to make sure I get the right hub.... Here are the hub sizes for the bike:
- Front and rear hub width: 100 mm and 135 hub spacing (As per what manufacture tells me. I assume this means 100mm front hub and 135mm rear hub)

I am thinking I want to go for a DT240s disc hub.

Is there a real compatibility difference between getting a 240S DB RW hub that is classified as a MTB hub vs Road Hub? It looks like the mountain bike version is the only one that uses the 6 bolt rotor mount (which is what I currently use), while the road bike version uses the center lock mount. Most noticeable difference I see is that the flanges on the center lock look to be the same width.

Road: https://www.dtswiss.com/Components/Hubs-Road/240s-db-RW
MTB: https://www.dtswiss.com/Components/Hubs-MTB/240s-RW-en

On my bike, I use the 6 bolt connection system. I CAN make the switch to center lock, but how much would that affect my current caliper mounts? I am using TRP Spyre calipers, so they have good adjustment.

Last edited by jeffrbake; 03-03-17 at 12:43 PM.
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Old 03-03-17, 11:56 AM
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fietsbob
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An MTB hub Should have better seals But as to the brand you desire, read up details on the company website

now Road, rim brakes, tends to be 130, but disc brakes end up putting a 135 hub on the back so the differences are largely more about the bike the wheel is on than the hub.
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Old 03-03-17, 12:23 PM
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Originally Posted by fietsbob View Post
An MTB hub Should have better seals But as to the brand you desire, read up details on the company website

now Road, rim brakes, tends to be 130, but disc brakes end up putting a 135 hub on the back so the differences are largely more about the bike the wheel is on than the hub.
Pretty sure I am set on DT. So normally it WOULD make a difference, but because I am using disc, I no longer really need to worry that the hub won't fit. At this point I am looking at the differences between going with center lock and the 6 bolt universal mount?

Is there any real reason to use the center lock system over the 6 bolt?

The wheels are going onto a pretty standard road bike. I am opting for slightly larger tires (19.5 inner rim diameter). It is not being used as a "racing" bike.
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Old 03-03-17, 12:54 PM
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I have a center lock on the front hub of my Bike Friday travel bike, I use a 6 bolt disc, with an adapter to mount it. it works fine.

I do part time work at LBS in summer Packing Touring rider's bikes to ship them back east, the disc comes off for packing

and not worrying about it getting bent in transit, because it is packed separately.

there , that is an advantage.. coming off easily, with a Shimano cassette lock ring tool

So you do have a choice in what discs you buy , to use on a centerlock splined hub.

May want a Shimano compatible driver on the rear hub, to have access to more cassette choices vs Campag type.





...
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Old 03-03-17, 03:25 PM
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Originally Posted by jeffrbake View Post
Is there any real reason to use the center lock system over the 6 bolt?
The only reason I can think of is that Shimano's top-level Ice-Tech rotors (RT-99, with the cast cooling fins) only comes in center-lock. If you're OK with the RT-86 (or any other company's rotors) then 6-bolt is just fine.

One drawback of center-lock: you need a cassette tool to remove the rotor. That means you may not be able to remove/replace the rotor if you're far away from a shop or your tool bench. Seems like a very rare scenario...

Originally Posted by jeffrbake View Post
The wheels are going onto a pretty standard road bike.
There is no such thing as a "standard road bike" with discs. Several manufacturers have tried to fit 130 mm OLD hubs on their disc road bikes (Specialized's SCS is one lousy example). Most manufacturers have just given in and used the 135 mm "MTB" hub width, like disc cyclocross bikes did several years ago.

Just saying, measure twice before you buy.
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Old 03-03-17, 03:28 PM
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Originally Posted by Tim_Iowa View Post
There is no such thing as a "standard road bike" with discs. Several manufacturers have tried to fit 130 mm OLD hubs on their disc road bikes (Specialized's SCS is one lousy example). Most manufacturers have just given in and used the 135 mm "MTB" hub width, like disc cyclocross bikes did several years ago.
Manufacture confirmed 135mm on the rear, 100mm front. I think that pretty much locks me into using the MTB variant without the center lock.
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Old 03-03-17, 03:59 PM
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My Rohloff is 135, that was all they made, until fat bikes came along.
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