- Product Name: MR 21531 LLB - ABEC-3 Radial Bearing
- Dimensions:
- Inner Diameter (ID): 21.5mm
- Outer Diameter (OD): 31mm
- Thickness: 7mm
- Bearing Type: Radial Bearing (designed to handle radial loads)
- Precision Rating: ABEC-3 (Annular Bearing Engineers Committee standard, offering high precision and smooth operation)
- Material:
- Races: 52100 High-Carbon Chromium Alloy Steel (vacuum-degassed for purity, hardened to Rockwell HRC 64)
- Balls: Grade 10 Chromium Steel (extremely round, within 10/1,000,000ths of an inch)
- Seals:
- Type: LLB (Light-contact, dual-lip labyrinth seals)
- Design: Rides in a micro-groove to form a full labyrinth, providing superior protection against water, dust, and debris
- Grease: 90% fill with Mobilux NGLI 2 high-pressure waterproof synthetic grease (ensures durability under daily use and harsh conditions)
- Clearance: C3 (slightly increased internal clearance for smoother operation under load)
- Weight: Approximately 15-20g (exact weight not always specified, but typical for this size and type)
- Purpose:
- Commonly used as a front hub bearing (e.g., older WTB 20mm hubs)
- Also found in some ISIS bottom brackets
- Features:
- Deep-groove raceways to accommodate larger balls, enhancing load capacity and durability
- Engineered for maximum ball complement within the races
- Item Code: BB MR 21531 LLB (Enduro’s internal reference)
Additional Notes:
- This bearing is an "oddball" size, not as common as standard metric bearings (e.g., 6000 or 6800 series), making it a specialty item for specific applications like hubs or bottom brackets.
- The ABEC-3 rating ensures a balance of precision and cost-effectiveness, suitable for most cycling needs without the higher cost of ABEC-5 or ceramic options.
- Available material variants include high-carbon chromium steel (standard), 440C stainless steel, ceramic-hybrid, or XD-15 with ceramic/stainless balls, though the MR 21531 LLB is typically the steel version unless specified otherwise.
ENDURO
Discover Enduro Bearings, the perfect choice for enhancing your bike’s performance with smooth, reliable, and long-lasting bearings. Ideal for mountain bikes and road bikes, Enduro Bearings ensure a smoother ride and improved durability. Upgrade your bike with components designed for excellence. Shop now for fast and reliable delivery from Hyper Ride.
Auckland Same Day Delivery
Live in Auckland? Get your order today with our Urgent Tonight service.
Excludes surfboards. Surfboards travel separately by van and are priced differently at checkout.
Available Monday to Friday, excluding public holidays. Delivered between 6:00pm and 9:00pm the same day.
Check the zone map below and look for the Urgent Tonight banner on eligible products.
We do not deliver to PO boxes, Great Barrier Island, or the Chatham Islands. Rural deliveries may also take an extra 1–3 working days.
Shipping Rates
| Category | Cost | Delivery | Items |
|---|---|---|---|
| Street Clothing & Footwear | $9.99 | 1–3 working days within New Zealand, plus 1–3 extra days for rural areas. | Street clothing and footwear. |
| Standard Nationwide | $14.99 | 2–3 working days within New Zealand, plus 1–3 extra days for rural areas. | Most items excluding surfboards, soft top surfboards, wakeboards, waterskis, SUPs, and bikes. |
| Medium Items | $19.99 per item | Standard delivery timeframe applies. | Bodyboards, board bags, longboard skateboards, moto boots, and moto helmets. |
| Large Items | $29.99 per item | Standard delivery timeframe applies. | Snowboards, snowboard packages, kneeboards, wakeboards, water skis, and bikes. |
| XLarge Items | $29.99 per item | Standard delivery timeframe applies. | Inflatable stand-up paddle boards. |
Bulky Items
Surfboards, Roof Boxes & Large Bike Racks
These items require special transport arrangements. Delivery can take up to 10 days depending on location within New Zealand.
Surcharges
We recommend delivery to a non-rural town or workplace to avoid this surcharge.
Due to high courier surcharges. Consider delivering to a friend in Auckland City who can bring it out.
Additional Information
Rural Delivery Information
Delivery times for rural areas can vary depending on how often couriers service your location. Some rural deliveries may only be serviced once a week, so we recommend checking with your local rural courier if timing is important.
Order Changes
Once an order has been placed, we cannot process cancellations or edits.
Shipping Days
Orders are not shipped on weekends or public holidays.
Tracking
Need your tracking number? Email ridesupport@hyper.co.nz and we’ll help you out.
Support & Freight
Freight Companies
- Post Haste and Bascik are used for orders shipped from Hyper Ride warehouse.
- Orders sent directly from a supplier will be shipped using the supplier’s nominated courier.
Shipping to Australia?
For Australian shipping information, head to our dedicated Shipping AU page.
We currently offer standard shipping only for Australia. All Australian orders are first received at our Auckland HQ, where they are collated and processed for export before dispatch.
$25 shipping plus a 2% import fee. The fee may vary depending on the item.
Estimated delivery time is 4–6 business days from dispatch.
Orders do not ship same-day. Processing and export prep can take up to 3 business days.
There are currently no express shipping options available for Australia.
We do not ship surfboards or stand-up paddleboards to Australia. We also cannot deliver to post shops or PO Boxes — a residential or business street address is required.
Shipping Overview
| Shipping Type | Cost | Delivery | Details |
|---|---|---|---|
| Australia Standard Nationwide | $25 + 2% import fee | 4–6 business days from dispatch (estimate only). | Orders are first collated at our Auckland HQ and processed for export before dispatch. Rural and remote areas may take longer. |
How Australian Orders Work
Order Processing
Orders do not ship same-day. All Australian orders first arrive at our Auckland HQ warehouse, where they are collated and processed for export. This can take up to 3 business days before dispatch.
Multiple Items
If your order contains multiple items, we’ll collate them at our Auckland HQ and ship them together so your order arrives in full.
Remote Areas
Delivery to rural or remote parts of Australia, including WA, NT, and Far North QLD, may take longer than the standard 4–6 business day estimate.
Dispatch Schedule
Orders are dispatched Monday to Friday, 8:00am–5:00pm NZ time. Our daily processing cut-off is 3:00pm NZ time. Orders placed after this, on weekends, or on public holidays will be processed the next business day.
Tracking, Customs & Returns
Tracking Your Order
You’ll automatically receive a Team Global Express tracking link once your parcel leaves Auckland and is scanned into the carrier network.
Customs & Duty Charges
International orders may be subject to customs or import duties once they reach Australia. These charges are the responsibility of the recipient. Hyper Ride cannot control, predict, or waive these fees, and we cannot mark orders as gifts.
Returns from Australia
Returns from Australia are not free. For full returns information, including how to lodge a return, please visit our Returns page.
Need Help?
Customer Support
For help with Australian shipping, tracking, or returns, email ridesupport@hyper.co.nz.
Quick Summary
- Standard shipping only for Australia.
- Orders are collated at Auckland HQ before export.
- Dispatch can take up to 3 business days.
- Delivery is estimated at 4–6 business days from dispatch.
- Remote areas may take longer.
