Introducing the Evolution of the DT SWISS Star Ratchet System - The RATCHET EXP

The renown Star Ratchet System™ from the engineering masters at DT Swiss has had a complete overhaul for 2019.

DT Swiss Ratchet EXP.jpg

Simple Maintenance


DT Swiss Ratchet EXP End caps.jpg

 

The no-tool concept allows the tool-free disassembly. Featuring an incorporated notch, the newly developed shape of the end caps simplifies disassembly significantly and therefore makes the maintenance even easier.

 

Freehub Body Conversion


DT Swiss Ratchet EXP Freehub.jpg

 

The no-tool concept allows the conversion to all different drive train standard within seconds. All DT Swiss Ratchet System hubs can be converted.

 

Less Weight - Less Parts


DT Swiss Ratchet EXP parts.jpg

 

The previous Ratchet system required two springs to function correctly as the inboard ratchet was not fixed to the hub shell. The fusion of the ratchet and the threaded ring in the Ratchet EXP hub not only increase durability, it also reduces the overall number of components, utilizing a single spring, resulting in a decrease in weight of the freehub system.

 

More Precision


DT Swiss Ratchet EXP springs.jpg

 

The previous systems required two conical springs which ensured the correct angle between the two ratchets. The fixed connection between the inner ratchet and the hub shell of the RATCHET EXP ensures that the inner ratchet is always aligned at the correct angle. Allowing the use of a single cylindrical spring resulting in a faster full engagement and therefore an increase in reliability.

 

Superior Reliability


DT Swiss Ratchet EXP reliability.jpg

 

Star Ratchet Systems
The full engagement of the ratchets creates a large contact surface and therefore small point loads, resulting in a superior reliability.

 

3 Pawl Systems
What makes the Ratchet System hubs superior, is the fact that all teeth on each of the ratchets engage simultaneously every time. In the case of pawl hubs, the engagement surface area is rather small. With the Ratchet System, the whole front face engages, creating much smaller point loads. The result is the legendary reliability of the Ratchet System hubs.

 

Increased Stiffness


DT Swiss Ratchet EXP stiffness.jpg

 

The hub stiffness is significantly defined by the distance of the bearings. For optimal performance it is important to maximize this distance, which is limited by the size of the freehub system. In the previous system the drive side bearing has to be placed next to the threaded ring and therefore the distance couldn’t be increased.

 

The integration of the drive side bearing into the threaded ring increases the bearing distance, resulting in a 15% improvement in hub stiffness.

 

 




9 Comments

DieselnDust, May 03 2019 11:00

gimme gimme new hubs for my birthday

JA-Q001, May 03 2019 01:07

So you cannot change the engagement angle anymore, the amout of engaging teeth are now fixed.

madbradd, May 03 2019 01:24

I imagine you can, just that the kit would now consist of a threaded ring. So could still change, just not as easily.

madbradd, May 03 2019 01:29

A quick google suggests that it is available in 36T and 54T, so already comes with the "stage1 upgrade".

MarcHD, May 03 2019 01:58

I imagine you can, just that the kit would now consist of a threaded ring. So could still change, just not as easily.

Spot on madbradd

Headshot, May 03 2019 03:42

Pricing is stratospheric - something like R16k a set. 

BaGearA, May 05 2019 01:08

Pricing is stratospheric - something like R16k a set.


I rather go buy two Hope factory built wheelsets

madbradd, May 06 2019 04:24

Where did you find pricing?

Jako_dT, May 09 2019 09:31

DT King ISO 180