TanTan TT-X68
FrameThe TanTan TT-X68 is a lightweight carbon road bike frame, a clone of the Specialized Tarmac SL8, sold by TanTan/Seraph via their websites or WhatsApp. It features a BSA threaded bottom bracket, integrated handlebar, and is designed for disc brakes with internal cable routing. The frame is noted for its low cost (around $700-$900 for frameset) and custom paint options. However, there are significant concerns about quality control, particularly regarding inconsistent fork weights and failures, with reports of some forks weighing around 330g (considered risky) and others around 400g (an 'enhanced' version). Other common issues include unfaced brake mounts and bottom bracket shells, paint overspray, and variable seatpost fit. Many users report good ride quality and value for money when the frame is built correctly, but experiences with customer service and manufacturing consistency are mixed.
AI Summary
Pros
- Excellent value for money, offering a lightweight, aero-inspired carbon frame at a fraction of the cost of major brands.
- Good ride quality; many users report it feels fast, responsive, and comparable to the original SL8 in terms of handling and comfort.
- Wide range of custom paint and color options available through TanTan/Seraph.
Cons
- Serious fork safety concerns: early batches had lightweight forks (~330g) prone to failure; later 'enhanced' versions (~400g) are recommended but supply is inconsistent.
- Poor quality control on manufacturing details: brake mounts and bottom bracket shells often not properly faced, leading to brake alignment issues and potential creaking.
- Variable customer service and communication; reports of wrong parts shipped, long delays, and difficulty resolving issues.
Magene Power Meter PES P505 Base 4 Bolt 110 BCD 24mm Cadence Pedal Balance Ant Steel Spindle Crankset Chainring for Shimano Sram
PowermeterThe Magene PES P505 is a budget-friendly spider-based power meter, often praised for its accuracy and value. Users report typical prices around $200-300 USD, with weights around 638g for the spider/crank combo (no chainrings). It uses a 24mm steel spindle compatible with Shimano bottom brackets, but has compatibility issues with T47 internal and BB386 bottom brackets due to spider clearance. The power meter requires specific chainrings (110 BCD for the P505 Base version) and uses a proprietary interface that locks it to Magene cranks unless purchasing the separate spider-only version (P505-S1103). Accuracy is generally good after calibration, though some units require power scaling adjustments. Common issues include left crank arm loosening (addressed with a redesigned preload bolt), occasional creaking, and firmware update problems.
AI Summary
Pros
- Excellent value for money, often priced around $200-300 USD
- Accurate power readings when properly calibrated, comparable to Favero Assioma and smart trainers
- Easy installation for Shimano-compatible setups with straightforward setup process
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Cons
- Left crank arm preload bolt frequently works loose, requiring threadlocker or replacement with redesigned bolt
- Not compatible with T47 internal and BB386 bottom brackets due to spider clearance issues with some frames
- Proprietary interface locks P505 Base version to Magene cranks only, cannot be used with other cranksets
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Magene PES P515 Power Meter Set 4 Bolt 110BCD 24mm Cadence Pedal Balance Ant Steel Spindle Crankset Chainring for Shimano Sram
PowermeterThe Magene PES P515 Power Meter is an updated version of the P505, featuring minor improvements including slightly reduced weight (approximately 25g lighter), improved accuracy (1% vs 1.5%), better T47 bottom bracket compatibility, and active temperature compensation. It maintains the same price point as its predecessor. The power meter uses a 24mm steel spindle, 110mm 4-bolt BCD, and is compatible with standard road bike bottom brackets (68mm-86.5mm). Users report mixed experiences with compatibility, installation, and customer support.
AI Summary
Pros
- Good value for money with competitive pricing around €250-£250
- Improved T47 bottom bracket compatibility compared to P505
- Active temperature compensation for consistent readings
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Cons
- Proprietary crank interface limits upgrade options to Magene cranks only
- Compatibility issues with some BB386 and T47 frames requiring spacers
- Poor customer support and communication from Magene
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