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Circuit | Drive

- Different MTB shifting systems (Shimano, older Sram, new Sram Transmission) each require their own adjustment logic and assembly.
- Wear on the chain, cassette and shift cable leads to imprecise shifting and must be recognised and rectified in good time.
- Changing the cassette requires suitable components (make, number of gears, freewheel); Sram and Shimano parts cannot be combined.

DIY mountain bike gears: adjust, maintain, replace wearing parts

- The author (1.60 m) tests 155 mm cranks, as standard lengths of 165-175 mm are often too long for short riders.  
- Shorter cranks reduce toe overlap, open up the hip angle, reduce knee flexion and thus improve stability and movement.  
- Initial rides and interval training show that the bike quickly feels "normal"; the 450-km endurance test is still pending.

Short cranks on a gravel bike: My first impression - I like it!

CIRCUIT | DRIVE

- Since 2013, Wolf Tooth has grown from a basement project to a manufacturer with 3500 m² headquarters, over 60 employees and a broad component portfolio.  
- The brand develops practical, detail-focussed solutions "by bikers for bikers" and manufactures the majority of its products using CNC in Minnesota.  
- Wolf Tooth focuses on tight tolerances, repairability, long service life and local production, but struggles with high material costs and customs duties.

A look behind the scenes at Wolf Tooth: bike parts made in the USA

- Shorter 155 mm cranks improve stance, control, centre of gravity and braking traction, especially downhill on E-MTBs and gravity bikes.  
- The more compact position facilitates low heels, more stable handling in high-speed and shock moments as well as controlled pedalling in technical terrain.  
- The disadvantage is less leverage when pedalling, which can be partially compensated for by a smaller chainring (32 to 28 teeth in the test), for example.

155 mm vs. 170 mm: Short cranks in the test - what they bring to mountain biking

- Shifting performance depends heavily on the condition and routing of the shift cables and outer cables; continuous routing increases protection and durability.
- Outer cables usually wear out more quickly than inner cables; it is recommended to replace them about once a season or every 5,000 kilometres.
- Brand sets such as Jagwire, Shimano and SRAM offer better, more durable shifting performance in the test; Teflon coatings do not offer any measurable advantages.

MTB drivetrain check: Everything you need to know about shift cables & outer casings

- Precise adjustment of B-gap and stop bolts prevents shifting problems and protects against damage to spokes, rear derailleur and frame.  
- A straight derailleur hanger, clean, high-quality cables and a chain that is changed in good time are crucial for precise, long-lasting shifting performance.  
- Moderate chain lubrication and cleaned derailleur pulleys reduce wear, dirt accumulation and noise in the drivetrain.

Shifting like the pros: The 7 most common mistakes when setting up the rear derailleur

- Ochain MY27 reduces pedal feedback through decoupled chainring, improves ride smoothness, traction and dampens vibrations on the feet.
- Four models: R and N for MTBs, S and E for Bosch Performance CX Gen5-E MTBs; adjustable degrees of freedom between 3° and 12° depending on the variant.
- Maintenance: elastomer change every 100 hours, full service every 200 hours; new seals are designed to improve durability and intervals compared to predecessors.

Ochain Update: No more drive influence - the downhill booster in '27 guise

- SRAM is slimming down its MTB line-up to three 12-speed groupsets: S100 (entry-level), S200 (mechanical) and S500 (wireless AXS).
- S100 brings UDH Half Mount, PG-1210 cassette with interchangeable sprockets and short cranks; S200/S500 offer XD cassettes and new Stealth levers.
- All S-series parts are compatible with previous Eagle components, but not with Eagle Transmission; market launch is April 2026.

SRAM Eagle S-Series: Three new groupsets from cheap to expensive without full mount!

- Microshift Advent MX is a robust 10- or 11-speed groupset with up to 11-50T for E-MTBs, focussed on durability and low price.
- SpeedRamps and 64 climbing aids enable smooth shifting under load; heavy-duty 11-28 chromoly steel sprockets are individually replaceable.
- Advantages are shifting performance, sustainability and value for money; disadvantages are higher weight, no 12-speed and limited image factor.

Microshift Advent MX: MTB shifting can be this affordable!

- New CUES-U6040-2x11 system saves 300 g: 100 g on the rear derailleur, 200 g on the 11-36 HG cassette compared to Linkglide counterparts.  
- Designed for entry-level road bikes, gravel and all-road bikes with drop bars; 327 % range for fast rides and steep climbs.  
- Positioned between Tiagra R4000 and Cues U6030; mechanical 2x11 groupset for all-road use on complete bikes for around 1500 euros.

New 2x11 components: Shimano Cues gets lighter

- Mechanical shifting systems with Bowden cables wear out and require maintenance; electronic systems are self-adjusting.
- The limit stops of the rear derailleur and front derailleur limit the swivelling range and must be checked after replacing parts at the latest.
- Remove resinified grease from older Shimano derailleurs with WD-40 and lubricate rear derailleur/front derailleur joints with oil.

Bike gears: The most important tips for the spring check

- Vor der ersten Tour Laufräder, Reifen, Bremsen, Antrieb, Schaltung und Fahrwerk systematisch auf Verschleiß, Funktion und Einstellungen prüfen.
- Bei E-Bikes Akku vollständig laden, Kontakte reinigen, ggf. Batterien von Remote/Schaltung tauschen und per App auf Firmware-Updates prüfen.
- Sicherheitsrelevante Teile wie Cockpit, Sattelstütze und Griffe mit Drehmoment anziehen, schmieren bzw. auf festen Sitz und ausreichenden Grip kontrollieren.

Mountain bike season start part 2: The spring check on the bike

Circuit & drive for bikes: test reports & recommendations ✓ Replacing components correctly ✓

Bike circuit & drive: Current test reports | BIKE

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Bike circuit & drive: Current test reports | BIKE

DIY mountain bike gears
Adjust, maintain, replace wearing parts

Short cranks on a gravel bike
My first impression - I like it!

A look behind the scenes at Wolf Tooth
Bike parts made in the USA

155 mm vs. 170 mm
Short cranks in the test - what they bring to mountain biking

MTB drivetrain check
Everything you need to know about shift cables & outer casings

Shifting like the pros
The 7 most common mistakes when setting up the rear derailleur

Ochain Update
No more drive influence - the downhill booster in '27 guise

SRAM Eagle S-Series
Three new groupsets from cheap to expensive without full mount!

Microshift Advent MX
MTB shifting can be this affordable!

New 2x11 components
Shimano Cues gets lighter

Bike gears
The most important tips for the spring check

Mountain bike season start part 2
The spring check on the bike

Bike circuit & drive: Current test reports | BIKE

DIY mountain bike gearsAdjust, maintain, replace wearing parts

Short cranks on a gravel bikeMy first impression - I like it!

A look behind the scenes at Wolf ToothBike parts made in the USA

155 mm vs. 170 mmShort cranks in the test - what they bring to mountain biking

MTB drivetrain checkEverything you need to know about shift cables & outer casings

Shifting like the prosThe 7 most common mistakes when setting up the rear derailleur

Ochain UpdateNo more drive influence - the downhill booster in '27 guise

SRAM Eagle S-SeriesThree new groupsets from cheap to expensive without full mount!

Microshift Advent MXMTB shifting can be this affordable!

New 2x11 componentsShimano Cues gets lighter

Bike gearsThe most important tips for the spring check

Mountain bike season start part 2The spring check on the bike

DIY mountain bike gears
Adjust, maintain, replace wearing parts

Short cranks on a gravel bike
My first impression - I like it!

A look behind the scenes at Wolf Tooth
Bike parts made in the USA

155 mm vs. 170 mm
Short cranks in the test - what they bring to mountain biking

MTB drivetrain check
Everything you need to know about shift cables & outer casings

Shifting like the pros
The 7 most common mistakes when setting up the rear derailleur

Ochain Update
No more drive influence - the downhill booster in '27 guise

SRAM Eagle S-Series
Three new groupsets from cheap to expensive without full mount!

Microshift Advent MX
MTB shifting can be this affordable!

New 2x11 components
Shimano Cues gets lighter

Bike gears
The most important tips for the spring check

Mountain bike season start part 2
The spring check on the bike