DT Swiss 240 Ratchet DEG Deepdive 

I think having both ratchets floating means they deal better with axle flex, contaminants, and tolerance issues. OneUps new hub uses a single floating ratchet and looks really well-made so that will be an interesting one to keep an eye on. -Tristan

@@WheelworksHandcraftedWheels Having already looked at One Up's hub information BOTH of the ratchets are floating. The "ring nut" is machined directly into the hub body (7075 T6) so is an integrated design. Bearings are 61902 so are 28mm dia. and are both driven out via the non-drive side. They use a 44t ratchet but ATM do not make a centre lock version and they require J bend spokes.

@johnlesoudeur3653 Both ratchets are 'floating' but the one in the hub shell has no spring so will always be pushed back into the hub. The freehub body ratchet has a spring on it so will have far more lateral movement. The only downside of this design is that the steel ratchet which is inside the hub shell will eventually wear the hub shell, although time will tell how long that takes I'll try and get some info up about the One Up - Tristan

@@WheelworksHandcraftedWheels Yes that would be good because it can be argued that although the inner ratchet is "floating" it is pretty much static, the outer ratchet does all the moving. I have an Elite Wheels Pro hub and they use a similar design but use use an Al alloy ring nut. No discernable wear and no issues.

@@johnlesoudeur3653 (with regards to the OneUp hub, not the 240 DEG in this video) the outer ratchet slides side-to-side to allow engagement, however the inner ratchet is still loose in the hub shell and will still rock and move as the hub flexes. This will almost certainly lead to wear on the hub shell...the long term questions are (a) how long does it take to occur (b) does it affect the hubs performance (c) does it matter ? I'm sure OneUp have done fatigue testing on this, both in the lab and real-world. Interestingly the early Hugi hubs, and I *think* even the DT Swiss branded ones, which used a 10mm steel axle only had one sliding ratchet ring and one spring. What comes around, goes around! -Tristan

Tried, tested, and true! It's a great hub with a great balance of all attributes and a reason it's the hub everyone tries to copy! -Tristan

Would you consider it even better than the previous (non-EXP, traditional Star Ratchet) 240s? "Better" in terms of durability, since the older 240s also had smaller bearings than the 350

​@@steveadorjan9048 by definition we only truly know what the durability of a product is like after years and years of use. In that regard I think it's too early to say about the DEG...the smaller bearings might be an issue, but the slightly wider bearing stance and different freehub design might mean bearing life is better. I think it's too early to say. -Tristan

@ssmtb yeah the Hope Pro5 is another example of a rock-solid pawl hub which works really well and has high engagement. We did a deepdive on these over a year ago and they've proven themselves to be a great hub -Tristan ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-57vEXF_H_vU.html

Coming soon! What, specifically, do you want to learn? -Tristan

@@WheelworksHandcraftedWheelsgreat to hear :)! i think they market the hub as the next go-to hub, trying to replace the 350. So would be interesting to see how it stacks up in build quality and serviceability and durability.

We've had the OneUp hubs arrive and they look great. I've shot some content but have been working on getting this DEG video finished. OneUp will be next -Tristan

@@WheelworksHandcraftedWheels Can't wait ;)

@@WheelworksHandcraftedWheelscan you do one on EERASE components hubs? Another ratchet driver hub that I really like

@FOTB407 yeah they're an interesting looking hub! We currently don't have any plans to add them to our 'in stock' range but they're certainly available for special order -Tristan

There is no part code on the DT Swiss website on in their techdocs. It's certainly a *removable* part but I don't think you'd want to! -TT

Have you checked that it's not the endcap rotating on the axle? -Tristan

@trentvlak After some of the EXP issues we say I was working on a way of measuring both freehub body drag and bearing drag, but honestly it's slipped down the priority list of projects. When the ultra low-drag Pro5s showed up I really wanted to resurrect that project but haven't :-( So without measuring, yes there is more freehub body drag. This is consistent with general physics that almost any 'type' of freehub will increase drag with more engagement points as you've got more things touching, more often. The DEGs larger diameter ratchet rings will also be contributing to this. One interesting thing about ratchet style hubs that I did notice with my testing is that the drag flattens out at a certain speed as the ratchets essentially skip over each other and don't have a chance to fully engage. Maybe one day I'll get that freehub body drag system up and running -Tristan

Bearing life is pretty hard to measure but we're certainly not seeing the 'lasts years' bearing life like the classic hubs. Some chew through bearings in a matter of months, others seem to last slightly better. -TT