The DT Swiss 350 hub sits in a useful middle ground: robust enough for proper mountain biking, simple enough to live with, and refined enough that it does not feel like a budget compromise. For XC and trail riders, the real decision is usually not whether it is “good”, but which version fits your frame, brakes, cassette and riding style. I’m going to break down the current 350 options, what the engagement numbers mean on the trail, and where the hub matters less than the rest of the wheel build.
The 350 is a practical hub, but the version you choose matters
- It is a workhorse MTB hub built around DT Swiss Ratchet systems, not a conventional pawl design.
- The main choice is between the 36T Ratchet system and the quicker 72T DEG version.
- Common modern MTB standards are Boost 110x15 front and 148x12 rear, with Center Lock or 6-bolt rotor mounts depending on the build.
- The hub is designed for easy servicing, and many parts can be maintained without special tools.
- On the trail, tyre casing, rim width and spoke count often change the ride more than the hub does.
Why I still rate the 350 as a serious trail hub
I look at the 350 as the sensible sibling in DT Swiss’ MTB range. It is not trying to win the “lightest possible” contest, but it does a lot of the things riders actually care about: dependable pickup, low-fuss maintenance and enough strength for real off-road use. That is why it keeps showing up on complete bikes and custom builds that are meant to be ridden hard rather than admired in a stand.
The important part is the freehub construction. Instead of a more fragile-feeling pawl layout, the 350 uses a Ratchet-based system, which spreads load more evenly and is easier to service. In practical terms, that means fewer little parts to worry about, a cleaner service process, and a hub that can keep going through wet winters and muddy rides without becoming a maintenance hobby.
I also like that the 350 does not force you into a single flavour of bike. Depending on the build, you will see different axle standards, rotor mounts and freehub bodies, so it can sit on anything from a straightforward XC bike to a more aggressive trail machine. Once you understand that flexibility, the next question becomes which 350 version is actually worth paying for.
Choose the version that matches how you ride
For most riders, the choice comes down to the standard 36-tooth Ratchet system or the faster 72-tooth DEG version. The difference is not abstract; you feel it when you are ratcheting through roots, restarting on a steep pitch or trying to maintain balance on a slow technical climb.
| Version | Best for | What it gives you | Where it is less compelling |
|---|---|---|---|
| 36T Ratchet system | XC, marathon, everyday trail riding | Simpler, dependable, and quick enough for most riding at roughly 10° engagement | Not as immediate when you want very fast pickup in technical terrain |
| 72T Ratchet DEG | Trail, enduro, e-MTB, stop-start riding | Faster pickup at roughly 5° engagement, which feels sharper in awkward sections | Usually the pricier option, and not every rider will notice the extra speed on smoother terrain |
If I were building a bike for mixed UK riding, I would not chase the faster version by default. On a fast XC bike, the standard Ratchet system is usually enough and keeps the build straightforward. I would move to DEG only if the rider regularly spends time in steep, technical terrain or simply knows they are sensitive to engagement delay. Once that is clear, the next thing to get right is compatibility, because that is where expensive mistakes usually happen.
Make the standards line up before you buy
The hub itself is only one part of the equation. A wheel can look “close enough” on paper and still be completely wrong for your frame, fork or brake setup. I always check the standards in this order: axle, rotor mount, cassette body and spoke count.
| What to check | Common 350 MTB options | Why it matters | Typical mistake |
|---|---|---|---|
| Front axle | 15x110 Boost on many MTB builds | Must match the fork spacing exactly | Buying a non-Boost front hub for a Boost fork |
| Rear axle | 12x148 Boost on many modern MTB builds | Must match the frame spacing and axle type | Assuming any 12 mm rear hub will fit |
| Brake mount | Center Lock or 6-bolt depending on the build | The rotor must match the hub interface | Ordering a rotor that needs an adapter you did not plan for |
| Freehub body | Shimano Micro Spline or SRAM XD on MTB versions | The cassette has to match the driver body | Buying the wrong freehub for your drivetrain |
| Hole count | 28h or 32h are the common MTB patterns | The rim drilling must match the hub | Trying to lace a 28h hub into a 32h rim |
What the engagement actually feels like on the trail
Numbers help, but the real question is whether the pickup feels useful. A 36T Ratchet system gives you roughly 10 degrees of engagement, which is already quick enough for a lot of XC and trail riding. A 72T DEG setup cuts that to about 5 degrees, so the crank starts driving the wheel sooner after you resume pedalling.
That extra quickness matters most in three places. First, on slow technical climbs where you are repeatedly ratcheting between pedal strokes. Second, in tight switchbacks where you need a near-instant response after coasting. Third, when you are balancing through awkward rock steps and want the wheel to answer without any dead feeling.
What it does not do is replace good tyres, sensible suspension setup or clean technique. I have seen riders chase faster engagement when the real problem was tyre grip or too much suspension bob. On a well-set-up bike, the difference between 36T and 72T is noticeable; on a poorly chosen wheel build, it is easy to overestimate what engagement alone can fix.
- Choose 36T if you ride smoother XC loops, long climbs and mixed terrain where simplicity matters more than snap.
- Choose 72T if you ride steep, technical or stop-start terrain and want the rear wheel to pick up a little sooner.
- Do not pay extra for the faster version just because it sounds more advanced.
That leads naturally to the question of price and positioning, because the 350 only makes sense if it sits in the right part of your budget.
Where it sits against the 240 and when I would spend more
The 350 is not meant to outdo the top-end 240 on weight. It is meant to give you most of the useful DT Swiss feel without pushing you into the most expensive corner of the catalogue. That is the right trade-off for a lot of riders, especially if the bike is going to be used in bad weather, on gritty trails or as a dependable training machine.
| Hub family | Main character | Best for | My take |
|---|---|---|---|
| 240 | Lighter, more premium, more race-focused | Weight-sensitive builds and riders who are happy to pay for the nicer part | Worth it if grams and top-end feel really matter to you |
| 350 | Balanced, service-friendly and hard to upset | XC, trail and general off-road riding | The one I would choose first for most practical builds |
If you are building a bike for racing at the sharp end, the 240 makes sense because every gram and every small refinement starts to matter. If you are building a bike to ride every week through British weather, I think the 350 is usually the smarter spend. The small weight penalty buys you a hub that feels easier to live with, not just faster to admire on a spec sheet.
Servicing is where the 350 earns its reputation
This is the part riders often ignore until a hub starts sounding dry or feeling rough. The 350 is attractive because it is built to be maintained without drama. On the Ratchet system, freehub servicing is straightforward, and on the DEG setup bearing replacement is designed so that you do not need to remove the threaded ring. That is a small detail on paper and a big quality-of-life win in the workshop.
I also like the way DT Swiss handles parts support. You can identify a product with the DT Swiss ID or material number, and spare parts are intended to stay available for at least five years even if the model is no longer in production. For a rider in the UK who does not want a one-season wheel, that matters.
- Clean and relube the hub regularly if you ride through winter mud or salty road spray.
- Do not force a sticky freehub; check the grease and seals first.
- Keep the product ID or material number handy if you ever need conversion parts.
- Use the correct grease and follow the hub-specific service guidance rather than improvising.
My rule of thumb is simple: if a hub is easy to service, you are more likely to service it on time. That keeps the wheel quiet, smooth and dependable, which is exactly what you want from a part that sits at the centre of every ride.
What matters more than the hub when you build the wheel
If I had to prioritise where performance actually comes from, the hub would not be first. Tyre casing, rim width, spoke count and tubeless setup often change how a wheel feels far more than the badge on the hub shell. That is especially true on trail bikes, where comfort, grip and puncture resistance affect speed as much as a faster ratchet ever will.
- Tyre casing controls support and puncture resistance. A tougher casing can transform a wheel more than a lighter hub does.
- Rim internal width shapes the tyre. Too narrow and the tyre feels vague; too wide and it can become harsh or heavy.
- Spoke count changes resilience. I tend to see 32h as the safer default for harder riding, while 28h suits lighter builds.
- Tubeless quality matters. A neat seal, reliable valve and correct tape save more hassle than most hardware upgrades.
- Rider weight and terrain should decide the build. A lighter XC rider and a heavier trail rider should not buy the same wheel spec.
So yes, the 350 is a very good hub family, but I would treat it as the centre of a wheel system rather than the whole solution. Get the standards right, match the engagement to the terrain, and build around a tyre and rim combo that suits the trails you actually ride. That is the combination that makes the wheel feel fast, quiet and durable long after the spec sheet has stopped being interesting.
