Newly Released Suspension & Components General

[Jabubu]

SILT have a 'unique' hub too, no idea if it's decent but here it is (see giant video on website)

AM Alloy (29") 1,869g

Rated by the Pros Serious Wheels for Serious Riding The SILT All-Mountain wheelse

siltmtb.com

 

[shiny]

Interesting….

TranzX Announces $499 Wireless Dropper Post

The EDP01 is the only wireless setup in Tranzx's dropper array. The post is priced near the bottom of its category.

bikerumor.com

 

[The Duckmeister]

Looks like an interesting idea. Don't like the splines machined directly into the main hub body, if this wears your up for a wheel rebuild. Would be better if there was a steel splined ring threaded instead.

I've seen a few Giant road hubs blow up because of that; the aluminium hub shell doesn't have the shear strength, and the splines rip off. Would definitely be A Bad Idea for the much higher torque of MTB use.

 

[dazz]

I've seen a few Giant road hubs blow up because of that; the aluminium hub shell doesn't have the shear strength, and the splines rip off. Would definitely be A Bad Idea for the much higher torque of MTB use.

I don't know the Giant design you are referring to and they may well be marginal on the shear area for the material used but I'm almost certain you don't have enough information for your statement to be accurate. I'm not about to sit down and run the numbers to prove it but I think it'll be plenty strong enough assuming appropriate grade and heat treat spec.

I know a thing or 2 about designing splined interfaces so feel confident in saying that it could be done if thorough design process is used.

It's like saying "CF is brittle so is def a bad idea for MTB frames!"

 

[The Duckmeister]

I don't know the Giant design you are referring to and they may well be marginal on the shear area for the material used but I'm almost certain you don't have enough information for your statement to be accurate. I'm not about to sit down and run the numbers to prove it but I think it'll be plenty strong enough assuming appropriate grade and heat treat spec.

I know a thing or 2 about designing splined interfaces so feel confident in saying that it could be done if thorough design process is used.

It's like saying "CF is brittle so is def a bad idea for MTB frames!"

The Giant hub used DT star ratchet guts but instead of using the standard steel drive ring they omitted it and had the splines for the ratchet plate machined directly into the hub shell. I don't know what grade alloy they used for the hub, but it wasn't up to the task, as I aw multiple examples of identical failure.

 

[dazz]

The Giant hub used DT star ratchet guts but instead of using the standard steel drive ring they omitted it and had the splines for the ratchet plate machined directly into the hub shell. I don't know what grade alloy they used for the hub, but it wasn't up to the task, as I aw multiple examples of identical failure.

In terms of the stresses involved with a splined interface like that, there's 2 that are really important. Shear is one and the other is the compressive load between the mating spline faces. Both are fairly easy to calculate and can be reduced by altering the geometry, within packaging constraints.
In saying all that, I'd also prefer to see that drive ring to be engaging inside a hardened steel sleeve. Purely for its ability to cope with a bit of grit or otherwise contaminated lubrication.