M Part Elite headset lower - ZS52/40
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Product Information
Full details
This high-end lower headset is designed for serious cyclists seeking superior protection against the elements and reliable performance. Its key benefit is the robust sealing technology that ensures longevity even in harsh British weather. A potential caveat for some users might be the specific bearing size required for replacement parts. The M Part Elite headset features aircraft-grade aluminum cups, quad-sealed precision angular contact bearings, and a flush seal design, all contributing to its durability and smooth operation. An expanding collar ensures a consistently tight fit.
All features
| Model Part Number | HPT540 |
|---|---|
| Brand | M Part |
Extended Product Information
FAQs
What is the warranty period for this headset?
The M Part Elite headset comes with a 3-year manufacturing warranty.
What type of bearings does this headset use?
It uses quad sealed precision angular contact bearings.
Can I replace the bearings if they wear out?
Yes, the bearings are fully replaceable. The specific replacement bearing size is R448B (40x49x6 45x45).
Is the star-fangled nut included?
Yes, an alloy top cap and star-fangled nut are included with the headset.
What is the weight of this headset?
The headset weighs approximately 92g, based on a 1 1/8" threadless headset with a steel crown.
How does the expanding collar design work?
The expanding collar ensures that once the headset is tightened, it remains securely in place, preventing loosening during riding.
Is this headset suitable for all weather conditions?
Yes, it is designed and tested in the UK for extreme British riding conditions, featuring advanced sealing to protect against moisture and dirt.
Troubleshooting
Headset feels stiff or gritty.
Contamination may have occurred. The bearings should be inspected, cleaned, and re-greased, or replaced if damaged. Professional servicing is recommended.
Headset loosens over time.
Ensure the expanding collar is correctly tightened during installation. If it continues to loosen, check for any damage to the collar or steerer tube.
Difficulty installing bearings.
Bearings require precise fitting. Ensure you are using the correct size (R448B 40x49x6 45x45) and that the headset cups are properly pressed into the frame.
Pros and Cons
Pros
- Exceptional durability in adverse weather conditions due to advanced sealing.
- Secure and long-lasting fit thanks to the expanding collar design.
- High-quality materials and construction for smooth performance.
- Designed and tested for demanding, real-world riding.
- Excellent warranty and readily available spare parts.
Cons
- Specific bearing size (R448B) might require careful sourcing.
- Higher price point reflecting premium materials and features.
- May be overkill for casual riders or less demanding conditions.
Setup, Compatibility & Care
Setup: This headset requires professional installation to ensure the precision CNC cups are seated correctly and the expanding collar is properly tightened. It is designed for threadless steerer tubes. An alloy top cap and star-fangled nut are included.
Compatibility: The ZS52/40 designation indicates its specific dimensions. Ensure your frame's head tube and fork steerer tube match these specifications before purchase. It is designed for use with 1 1/8" steerer tubes as standard, though specific configurations may vary.
Care: While the sealing is designed for protection, regular cleaning of the bike, especially around the headset area, is recommended. Avoid high-pressure washing directly at the seals. If any stiffness or noise develops, it is advisable to have the bearings inspected and serviced or replaced by a qualified mechanic. The bearings are fully replaceable.