RMO Brand ET2015 15x20x3.5mm Ultra-Thin Section Ball Bearings for Cycling
| Item No : | ET2015 |
| Size (d*D*B) : | 15x20x3.5mm |
| Material : | Chrome Steel GCr15 |
| Lead Time : | 3-5 days |
| Weight : | 0.002KG |
| MOQ : | 100 pcs |
| Service : | Support Sample Testing |
⚙️Product Description:
The ET2015 (15x20x3.5mm) is an ultra-thin miniature ball bearing tailored specifically for weight-critical bicycle components and ultra-compact mechanical links. Featuring a 15mm inner bore, 20mm outer diameter, and a razor-thin 3.5mm profile width, it allows cycling engineers to minimize housing mass without sacrificing rotational accuracy. Factory pre-lubricated with high-grade water-resistant synthetic grease, this precision component delivers smooth, frictionless performance in high-frequency, light-load applications. We supply these specialized bike bearings under our proprietary RMO brand while offering nimble OEM procurement for bicycle component manufacturers and aftermarket distributors worldwide.
⚙️Product Features:
- Extreme 3.5mm Ultra-Thin Profile: Reduces radial and axial envelope size to the absolute minimum, allowing sleek frame integration and maximum weight reduction.
- Water-Resistant Synthetic Lubrication: Pre-packed with specialized grease designed to resist washouts from rain, mud, and power washing during intense cycling.
- Precision Smooth Raceways: Micro-polished raceways and high-precision steel balls ensure low rolling resistance and fluid steering or pedal stroke feel.
- Corrosion-Resistant Options: Engineered with high-purity GCr15 chrome steel or optional stainless steel, ensuring long-term durability in harsh weather.
⚙️Product Application:
Engineered for extreme weight savings and micro-spatial integration, the ET2015 bearing is widely specified in:
- Ultralight bicycle headsets, steerer tube spacers, and integrated cockpit assemblies.
- Bicycle pedal spindles, clipless pedal bodies, and titanium axle rebuild kits.
- Rear derailleur pulley wheels (jockey wheels) and chain guide rollers.
- Full-suspension MTB linkage pivots, micro gimbals, and lightweight drone joints.
⚙️Precautions:
| 1. Keep clean | 2. Use with caution | 3. appropriate tool | 4. Hot-loading | 5. Be careful of rust |
| Dust will have a bad effect on the bearing, so keep the surrounding clean. | Strong impact during use can easily cause scratches and indentations. | Avoid replacing existing tools, and use appropriate tools. | Bearings are precision parts, so hot installation is recommended. | Sweat on your hands during operation will cause rust, so it is best to wear gloves. |
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⚙️Obtain Certificate:
About Rimao
Since its establishment in 2011, Rimao Bearing has combined international vision with local wisdom and injected innovative ideas into every bearing and pulley with its profound industry accumulation and unremitting pursuit of technology. We have not only passed CE and ROHS certification, but also set a new benchmark in the industry and led the development trend of the bearing industry.
We are not just a ball bearing and roller bearing importer and wholesaler. We provide real solutions to help you achieve the product and design goals set by your customers. With more than 20 years of production and sales experience, tens of thousands of models and specifications, we look forward to cooperating with you!
⚙️Technical Parameters:
| Model / Industry No. | ET2015 |
| Metric Dimensions | 15x20x3.5mm (Inner d x Outer D x Total Width/Height H) |
| Bearing Type | ET / Special Ultra-Thin Series Ball Bearing |
| Seal Type | Open |
| Ring & Ball Material | GCr15 Chrome Steel / Stainless Steel Option |
| Precision Grade | P0 / P6 (ABEC-1 / ABEC-3) Optional |
| Lubrication | Pre-filled Water-Resistant Bike Grease |
| Target Machinery | Bike Headsets, Pedals, Derailleur Pulleys |
| Brand | RMO (Own Brand) / Neutral / OEM Custom / Other Global Brands |
| Package | Individual plastic bag, plastic tube or original RMO brand box |
| Lead Time | 3-5 days for stock; 7-15 days for bulk orders |
| Shipping | Express (DHL/FedEx/UPS), Air Freight, Sea Freight |
| Payment | 100% TT, or 30% TT In Advance, 70% TT After Finished Production |
| Model No. | d | D | H | m |
| ET1510 | 10 mm | 15 mm | 3 mm | 1.4 g |
| ET2015 | 15 mm | 20 mm | 3.5 mm | 2.1 g |
| ET2115 | 15 mm | 21 mm | 3.5 mm | 2.43 g |
| ET2216 | 16 mm | 22 mm | 4 mm | 3.04 g |
| ET2316 | 16 mm | 23 mm | 4.5 mm | 4.03 g |
| ET2418 | 18 mm | 24 mm | 4 mm | 4.25 g |
| ET2520 | 20 mm | 25 mm | 4 mm | 3.55 g |
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