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Overfast

OVERFAST 5grams Ultralight Battery Holder Cover for Colnago Y1RS | Carbon Fiber Shimano Di2 & Sram

OVERFAST 5grams Ultralight Battery Holder Cover for Colnago Y1RS | Carbon Fiber Shimano Di2 & Sram

Regular price $95.00 SGD
Regular price Sale price $95.00 SGD
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Option
Carbon Finishing
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2026 July New version available now

OVERFAST kept pushing Y1RS to its lightest

  • Designed for Colnago Y1RS (all versions)
  • Material: Reinforced carbon fiber composite + Titanium screws
  • Weight: 5.1g(Sram) / 10g±3% (Shimano)
  • Color: Black matte
  • Craftsmanship: High-precision CNC cut out from Carbon fiber block
  • Note: Di2 battery is not included
  • For Di2, comes with an additional battery holder replacement bracket
  • Lazer with tightening line indicator

COLNAGO Y1RS Best weight loss accessories! Battery Holder!

Lightweight, but strong!

It can withstand more than 2000 extreme drop tests of 100 cm with battery weight. It takes dozens of kilograms to bend it. Enough redundant strength design, so you do not have any worries!

Direct CNC from high force compressed carbon fiber block, squeenze out every single drop of excessive epoxy to get untra lightweight carbon fiber. With smoothing edge lazer cutting technic, much stronger and stable than traditional hand layer epoxy technic, with much high quality control standard.

Simple installation, you just need to slide the screw to the scale line below and lock it!
Eliminate potential rattling from loose Di2 battery

All accessories include titanium screws, and the total weight is only 9g! You can save a lot of weight! If you replace the 2 original bottle cages+ battery holder and use 2 lightweight bottle cages, you can even reduce the weight by more than 80g.

Important Note:
Push battery cover to the lowest position before tightening

Warranty Information

Warranty Coverage

All Overfast products are covered by a 2-year warranty against manufacturing defects. This warranty does not cover damage caused by misuse, accidents, crashes, improper installation, modification, or normal wear and tear.

Warranty Claims

To process a warranty claim, customers must provide clear photos and/or videos showing the issue. Once the claim has been reviewed and confirmed by Overfast, replacement parts will be arranged as quickly as possible.

Thru-Axles

For defective thru axles, please provide clear photos or videos of the affected product. Once the defect has been verified, a replacement will be shipped promptly.

Cranksets

If a crank arm suffers a confirmed manufacturing defect (non-user-related), please provide detailed photos and a description of the issue.

After approval:

- The defective crank arm must be permanently destroyed (for example, by drilling a hole through it).
- Evidence of destruction must be submitted.
- If only one crank arm is defective, only the affected side will be replaced.

Once the above requirements are met, the replacement will be arranged immediately.

Wheelsets

Warranty service for wheelsets depends on the specific component that has failed. After inspection, Overfast will provide the appropriate replacement part or component based on the confirmed issue.

Other Products

The same warranty process applies to all other Overfast products. As long as sufficient evidence is provided to verify a manufacturing defect, warranty claims will be prioritised and processed promptly.

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Crash Replacement Programme

For products damaged due to crashes, accidents, or other user-related incidents, Overfast offers a Crash Replacement Programme.

Eligible customers may purchase a replacement product at 30% off the recommended retail price (70% of MSRP).

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Notes

- All warranty claims are subject to inspection and approval by Overfast.
- Clear photos, videos, and any other requested documentation may be required before a claim can be approved.
- Overfast reserves the right to determine whether a claim qualifies under the warranty or the Crash Replacement Programme.

Returns & Refund Information

We want you to be fully satisfied with your purchase. However, please note that returns and refunds are only accepted for genuine product quality issues, such as cracks or structural breaks.

Issues such as creaking or noise are generally the result of improper installation and are not considered product defects.

Not Eligible for Return or Refund

Returns will not be accepted under the following conditions:

  • Improper installation or use
  • Normal wear, surface marks, or cosmetic blemishes
  • Damage caused by misuse, over-torque, or accidents
  • Any modification or alteration of the product
  • Products showing signs of use (including clamp or installation marks)

Returns Due to Wrong Model Ordered

If the incorrect model was ordered by you:

  • You are responsible for all return shipping costs.
  • Once we've received your return, we will refund you the purchase amount less:
    • a) Payment gateway fee of 7% (this is what our credit card company charges us)
    • b) Shipping costs, even if you received "free shipping", as we subsidise shipping at our own expense.

Additional Notes

  • Returned items must be in unused, original condition and complete with all packaging.
  • Products showing any signs of installation or use will not be eligible for return.
  • If reshipping is required, the reshipping fee will be borne by the buyer.
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