説明
A wheel is a circle of tension held in place by two small pieces of metal. Everyone upgrades the tyre, then the rim, then the groupset, and leaves the hubs until the freehub starts to skip on a climb. The hub is the only part of the wheel that has to be true under load, quiet in freewheel and serviceable after a winter of grit, and it is the cheapest place to buy reliability.
These are ARC hubs in aluminium alloy with four sealed cartridge bearings, a quick-release axle and a disc-brake mount, drilled for 32 holes in the common 28 and 36 hole options across the range. Sealed cartridges rather than loose balls is the decision that defines the product: a cartridge hub is not smoother from new, but it survives mud, jet-wash and a wet commute without needing a repack every season, and when it does wear, the bearing is a part number rather than a rebuild.
The 4-bearing layout is the load argument. Two bearings per hub carry the axle across a wider stance, which reduces the angular load on each race when the wheel is leaned into a corner or loaded in a landing. On a mountain bike that is the difference between a hub that lasts three seasons and one that develops play after a wet summer. The HG freehub body covers 8, 9, 10 and 11 speed cassettes, which keeps an older drivetrain serviceable without changing the wheelset.
Build quality shows in the small tolerances: the axle seats square, the disc mount faces are machined rather than cast, and the freehub engages without the half-turn of slack that cheap hubs develop. Spoke holes are drilled at the angle the rim actually needs, so a wheel built on these hubs tensions evenly rather than fighting the flange. Fit them, ride them, and the only maintenance in the first year is a wipe.
Frames and forks get the attention. The hub is what actually decides whether the wheel survives the season.
Key Features
- Four sealed cartridge bearings Two per hub carrying the axle across a wider stance, which lowers angular load on each race under cornering and landings.
- Aluminium alloy hubs A stiff flange with machined faces, rather than a casting that flexes under spoke tension.
- Disc brake mount Machined mounting faces so the rotor sits square and does not rub under load.
- Quick release axle Standard QR fitment for the frames and forks most riders are already running.
- 32 hole drilling With 28 and 36 hole options across the range, matching the rim rather than forcing a compromise.
- HG freehub, 8 to 11 speed Keeps older drivetrains serviceable without replacing the wheelset.
- Serviceable cartridges When a bearing wears, it is a part number, not a rebuild with loose balls and a cone spanner.
- Front and rear pair Supplied as a matched set with the same bearing specification on both ends.
Technical Specifications
- Brand: ARC
- Category: Sealed bearing hub set
- Material: Aluminium alloy
- Bearings: 4 sealed cartridge bearings
- Positions: Front and rear
- Spoke holes: 32 hole, with 28 and 36 hole variants across the range
- Braking system: Disc brake
- Axle: Quick release
- Freehub: HG, 8 to 11 speed
- Speed compatibility: 8, 9, 10 and 11 speed cassettes
- Build use: MTB, hybrid, gravel and touring wheels
- Service: Cartridge replacement, no cone adjustment
Where It Belongs
This is the hub set for the wheel build that has to last: the mountain bike ridden through British winters, the touring bike carrying load on bad roads, the commuter that gets jet-washed and left wet. It suits the rider rebuilding a set of wheels around a rim they trust, and the workshop that builds wheels for customers who come back angry when a freehub fails in six months.
Frequently Asked Questions
Q: Will these fit my bike?
A: They will if your frame and fork use quick release axles. Through-axle frames need a different hub, so check the dropout before ordering.
Q: What is the advantage over loose ball hubs?
A: Sealed cartridges keep grit out and need no repacking. A loose ball hub can feel smoother when new, but it needs servicing every season and dies fast in mud.
Q: Which spoke count should I choose?
A: Match the rim. 32 hole is the all-round choice for mountain and touring use; 28 suits lighter riders and road, 36 suits loaded touring and heavier riders.
Q: Can I run an 11 speed cassette?
A: Yes, the HG freehub covers 8 through 11 speed. A 12 speed cassette needs a different freehub standard, so this is not the hub for that drivetrain.
Q: Are the bearings replaceable?
A: Yes. They are standard cartridges, which is the point of the design. Press the old ones out, press new ones in, and the hub is back in service.
Q: Do they come as a pair?
A: Yes, front and rear with the same bearing specification. Check the option line for the exact hole count and colour.
Q: How much maintenance do they need?
A: A wipe after wet rides and a bearing check once a year. No cone adjustment, no grease purge, no repacking.
The EastSupplier Promise
Every unit ships from inspected stock held by our own team, not from a blind dropship queue. Orders placed before 3pm warehouse time leave the same working day, and each parcel carries a tracking number you can follow from dispatch to doorstep. If a unit arrives damaged or does not match this listing, we replace or refund it inside 30 days.
- Stock checked daily: the inventory figure on this page is live, not a placeholder.
- Technical answers in English: a human replies to product questions within one business day.
- No surprise fees: the price you see is the price at checkout.








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