German manufacturer Schmolke is challenging conventional wheel design with its new TLO 50 carbon wheelset, boasting a remarkably low weight of under one kilogram. The wheels, previewed late last year, aim to redefine performance for climbers and riders prioritizing lightweight builds. Headlinez.news presents a detailed review of the TLO 50, examining its technical specifications and real-world performance characteristics as assessed through recent testing.
For years, the idea of a high-profile wheel that could also deliver premium performance on climbs seemed like a distant goal. But advancements in disc brake wheel weight and a shift towards higher profiles even among professional cyclists have changed the landscape. Now, Schmolke is pushing those boundaries further with its new TLO 50 wheelset, boasting a 50mm rim and a total weight of under one kilogram.
The wheels were first previewed in late 2025, and anticipation has been building. After several weeks of testing, here’s a detailed look at the technical specifications and performance impressions.
The first thing you notice when taking the wheels out of the box is their incredible lightness, particularly the front wheel. It’s a striking sensation.
1 – Technical Details
Table of Contents
– Rim Characteristics
According to Bikepassion, the Italian distributor for Schmolke, the German company spent the last two years developing a rim that not only meets the demands of modern cycling but also raises the bar in terms of weight and stiffness. The path to achieving an aerodynamically efficient rim with excellent damping and high torsional rigidity began with materials and the latest advancements in carbon fiber technology.
The Schmolke TLO 50 rim utilizes T1100 carbon fiber, crucial for minimizing weight and ensuring high rigidity. However, the hybridization requires careful management, as the wheel experiences multi-directional and impact stresses different from frames.
The result is a rim with a 50mm profile, a mini-hook structure for compatibility with both inner tubes and tubeless setups, a 25mm internal channel width, a 32.5mm external width, and a stated weight of just 315 grams. For comparison, Enve SES 4.5 PRO wheels used by Tadej Pogačar weigh less than 1,300 grams and utilize rims weighing approximately 370-380 grams each.
– Spoke Details
The spokes are made of carbon fiber with titanium nipples. Schmolke is keeping the structural and construction details of the spokes closely guarded, but states they are among the lightest in the category, weighing just 1.8 grams each – less than half the weight of a steel spoke.
The spoke profile is slightly aerodynamic, with an elliptical shape, but thinner than recent trends. In contrast, Schmolke opted for 24 spokes on both the front and rear wheels, compared to the 20 or 21 spokes commonly used by competitors on carbon-spoked wheels. This choice likely aims to ensure sufficient stiffness, as well as good vibration absorption, on such a lightweight wheel.
– Hub Characteristics
The Schmolke TLO 50 wheels, like the 37mm rim version, can be mounted with DT Swiss 180, Extralight, and NONPLUS hubs. The test wheels arrived equipped with NONPLUS Primaro hubs, featuring a minimalist design and a lightweight freehub body.
The hubs are made of aluminum, but have a combined pair weight of just over 200 grams. The ceramic bearings contribute to the wheel’s overall performance.
– Weight
The measured weight is just 973 grams, including valves and tubeless tape. This is an exceptional result considering the rim height. For those prioritizing maximum lightness, there’s also a 37mm version weighing less than 900 grams. It’s difficult to find anything better, especially without real weight limits for the cyclist+bike system, which in this case is set at 115 kg.
– Price
The cost of the Schmolke TLO 50 in the configuration we received for testing, with NONPLUS hubs, is €3,700. While high, it’s reasonable considering the weight and exclusivity of the finished product, compared to carbon-spoked wheels from most top brands. With DT Swiss 180 hubs, the weight increases by approximately 80 grams, but the price drops by €500 – that would be my ideal configuration.
– Warranty
Schmolke offers a 3-year warranty on these wheels, upon registration on the website. There’s also a crash replacement service offering a discount based on the date of purchase: 50% within 12 months, 30% up to 2 years, and 15% for life.
2 – Performance
– Climbing Performance
The combination of a high-profile rim and a weight of under one kilogram makes this wheelset exceptional, especially for climbing. The steeper the gradient, the more its qualities are appreciated. It’s not just for strong riders; it can also help those who ride slower and can benefit from a lighter wheelset.
The steeper the climb, the more its qualities stand out compared to other products.
– Downhill Performance
Overall, the wheels are well-balanced, thanks in part to the wide channel which helps build confidence and the manageable stiffness. The extreme lightness initially feels a bit unsettling, giving the impression of a slightly more “twitchy” front end, but you quickly adjust. Braking performance, which was a slight concern given the low weight, is also very good.
– Torsional Stiffness
In terms of absolute stiffness, there are wheels with superior performance, but those typically weigh at least 300-400 grams more. However, considering the stiffness-to-weight ratio, the Schmolke TLO 50 are difficult to beat.
Technically, these wheels might not be the first choice for a super-powerful sprinter, but they are perfect for all other categories of cyclists, with a preference for lightweight climbers.
– Rolling Resistance
As often noted, a laboratory test is needed for an objective assessment of rolling resistance. The hubs are well-made and feel very smooth. Overall, they don’t make a significant difference on flat terrain, likely due to the spokes being slightly less aerodynamic than some competitors, but perform well at higher speeds. The key concept is that these are excellent climbing wheels, without significant drawbacks on the flats.
– Comfort
The comfort level is good, above average for high-profile carbon wheels. In this regard, the wide channel and the higher spoke count (24 versus 20 or 21) likely play a key role.
For even greater vibration absorption, using a slightly wider tire, inflated a bit less, is recommended. The extreme lightness of the rim allows this without significant drawbacks on climbs, as the overall peripheral weight remains very low. The excellent stability offered by the wide rim also makes the Schmolke TLO 50 suitable for windy days.
