Set up your wheels for the next jam session with Dirt Jump 370 DJ-
specific hubs featuring the 36T Ratchet LN freehub system on the single-
speed rear hub, with a 12-tooth sprocket. The front hub comes without a
disc mounting interface, brakeless up front and unleash all your
creativity when tricking, there's nothing holding you back from pumping
up the jam!
Freehub system
Ratchet LN 36
Front hub
No brake, no cable – simplicity in the service of tricks and stunts.
Rear hub
Singlespeed only, with a 12 tooth sprocket.
Ratchet LN system
The reliability of the freehub system is ensured by the Ratchet LN system.
Bolt-on rear hub fixation
The hubs are available in 20/110 mm (non boost) and 10/135 mm.
PUMP UP THE JAM
technology
We believe in the art of engineering and strive for sophistication in the product development process. Our guiding idea is to constantly push barriers with our inhouse developed technologies.
Ratchet LN is the entry level Ratchet System and replaces the pawl freehub system. Ratchet LN allows DT Swiss hubs with pawl systems to be upgraded to Ratchet Systems.
Learn how to ensure the optimal rotating property of the ball bearings and discover why DT Swiss does not offer hubs with adjustable bearing clearance.
According to your selection 370 we found 2 models. Please use the model finder above to narrow down the models. Select the model for which you need product support.
Are you looking for the user manual, searching for compatible replacement parts, or do you want to know which components are installed in your product?
All this information is stored in our useful Product Support. By entering the 7-digit DT Swiss ID or scanning the corresponding QR code / dot code with your mobile camera, you can easily identify your product. Please note that the dot code can only be read with this specific scan reader.
Since 2020, all wheels and suspension products are equipped with the 7-digit DT Swiss ID. If your product does not have a DT Swiss ID, you can also identify it using the filter function or the material number. Here you can find everything about the exact positioning of the DT Swiss ID on our products.
Under Product Support, you will find exact details of all conversion options for your product (wheel, hub). First go to Product Support and select your product using the DT Swiss ID or filter. Under "Conversion" you will find the exact details for all conversion options. You will also find helpful How To videos and manuals.
Regular hub service is worth it! Dust and dirt cause wear parts to wear out faster, which can impair function. We recommend cleaning the hub every 12 months and lubricating it with a suitable grease. Here you can find How To videos and user manuals for hub servicing. If you need to replace a ratchet, please contact our Service Center or a dealer.
There are various reasons why the freehub may be stuck. Our technical manuals can help you find the cause:
You can also convert our Pawl hubs to the Ratchet LN System. You can buy the Ratchet LN upgrade kit from dealers. The How To video explains conversion step by step.
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For MTB, boost hubs have become the new industry standard. The greater bearing distance increases the lateral stiffness of the bike and reduces ball bearing wear.
Unfortunately, you cannot convert non-boost hubs to wider distances nor boost to narrower distances (non-boost). This is because the boost hubs are wider in the center.
