Yay - New Hub / Axle Standard

[Matt92037]

As a MTB'er this stuff drives me nuts.

https://bikerumor.com/2021/01/27/exp...it-affect-you/

[joevers]

To be fair I think the slow adoption of 12x148mm on gravel/all road bikes is a surprise to no one. Especially since Shimano and Sram are both moving chainrings outboard. 12x110 is kind of a head scratcher though.

I think for road bikes, you'll probably continue to see 12x142, if for no other reason than keeping Q factor to a minimum. People on all road and gravel bikes seem far less picky.

[vqdriver]

Wish they'd just go straight to spherical front wheels and be done with it.

[Mark McM]

Originally Posted by joevers

To be fair I think the slow adoption of 12x148mm on gravel/all road bikes is a surprise to no one. Especially since Shimano and Sram are both moving chainrings outboard. 12x110 is kind of a head scratcher though.

I think for road bikes, you'll probably continue to see 12x142, if for no other reason than keeping Q factor to a minimum. People on all road and gravel bikes seem far less picky.

The "stiffer wheels" thing is just a fringe benefit. The real reason for this move is for greater commonality of parts between all bikes, reducing SKUs for the manufacturers and saving money. Road boast might help with Gravel/Adventure/All-road bikes which use larger tires, but it has more deficits than benefits for pavement bikes.

The most important aspect of a bike is how well it fits the rider. But too often the bike makers use a "one-size-fits-all" approach, reducing the range of rider fit. To me, a wide Q-factor makes pedaling feel more like waddling. On an MTB with wider tires, there's often no way around that (although I do use the narrowest MTB cranks I can find). But there's no reason a road bike with tires of 35mm or less needs a wider chainline than currently used on road bikes, so I for one am not interested in Road Boost spacing, and hope it does not become the standard for road bikes.

[C40_guy]

It's about time. I've been waiting for a new standard....

All of the old ones, are so, old...

[EB]

If people really want their road bikes to be mountain bikes, Sam Pilgrim already showed us the way: https://www.youtube.com/watch?v=mctjXPhPPeo

[Matt92037]

They should have learned from the MTB community and jumped straight to Superboost (157mm)!

[JWB475]

Won't 148mm boost rear spacing with a standard 68mm Road BB Shell just mess up the chainline?

I guess if you use GRX or SRAM Wide you are already basically riding the equivalent of a 73mm BB shell anyways so maybe it isn't that big of a deal...

[pasadena]

Just wait for the new threaded bb standard....

Originally Posted by JWB475

Won't 148mm boost rear spacing with a standard 68mm Road BB Shell just mess up the chainline?

I guess if you use GRX or SRAM Wide you are already basically riding the equivalent of a 73mm BB shell anyways so maybe it isn't that big of a deal...

[JWB475]

Originally Posted by pasadena

Just wait for the new threaded bb standard....

No doubt, I mean how long has it been since we had a new BB standard? The last one was T47 right?

[pasadena]

Originally Posted by JWB475

No doubt, I mean how long has it been since we had a new BB standard? The last one was T47 right?

LOL, maybe.
There are literally over 20 different bb sizes....

they still have decimal points...

73.5, 68.4, T47.8..... after everyone buys "RoadBOOST", then move to "SuperBoost"... gotta make people buy all new everything somehow I guess...

[sg8357]

Originally Posted by pasadena;2871371[snip

after everyone buys "RoadBOOST", then move to "SuperBoost"... gotta make people buy all new everything somehow I guess...

IRD has their new bottom bracket......

[Mark McM]

Originally Posted by JWB475

Won't 148mm boost rear spacing with a standard 68mm Road BB Shell just mess up the chainline?

You can always put a longer spindle in a narrow BB shell. Unfortunately, you can't go the other way around. The 68mm ISO BB shell is still the most universal BB shell standard, and can fit nearly all the cranks on the market (square taper, Octalink, Isis, Hollowtech, GXP, Ultra Torque, Power Torque, BB386, etc.).

[dddd]

If I needed any of the benefits of 148X12, then I would be more than fine with it, only I wouldn't use a boost crankset.
This way, I could better exploit the possibility of using a 2x crankset, since I don't see myself riding a gravel bike with wider than 38mm tires.
The chainline would likely be ideal for me since I never (and never would) run small-to-small.

[unterhausen]

148x12 is nbd. There was never a reason for 12mm front axles and I'm still a bit salty about it. Now there is doubly no reason for 12x110, just go to mtb boost and be done with it.