SHIMANO
✓Price
$22.99
MechPort 2Pcs O-Ring 1270016119 for Mounting Chainring BDU4XX Compatible with Bosch 37YY 31YY 38YY E-Bike Spider Seal
★★★★★
$22.99
Quantity
1
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About this item
- Application: Used to secure the chainring or spider when the lockring is loose, preventing movement during pedaling.
- Compatibility: Compatible with Bosch Performance Line Speed BDU4XX, Cargo Line BDU4XX, and models 37YY, 31YY, 38YY.
- Material: Made from NBR (nitrile rubber), offering flexibility and reliable sealing performance under typical e-bike conditions.
- Dimensions: Measures 28 mm inner diameter with 1.8 mm thickness, designed for precise fit on the chainring assembly.
- Replacement Use: Designed to replace worn or missing O-rings to maintain chainring stability and proper drivetrain function.
Product description
Item Descriptions: -Application: Used to secure the chainring or spider when the lockring is loose, preventing movement during pedaling. -Compatibility: Compatible with Bosch Performance Line Speed BDU4XX, Cargo Line BDU4XX, and models 37YY, 31YY, 38YY. -Material: Made from NBR (nitrile rubber), offering flexibility and reliable sealing performance under typical e-bike conditions. -Dimensions: Measures 28 mm inner diameter with 1.8 mm thickness, designed for precise fit on the chainring assembly. -Replacement Use: Designed to replace worn or missing O-rings to maintain chainring stability and proper drivetrain function. Package: 2x orings Item Specifications: Dimensions:28 x 1.8 Colour:Black Material:Rubber
Product details
Customer reviews
What customers say about Bigamart
10 Trustpilot reviews total, with 2 shown at a time.
Trustpilot
★★★★★
Excellent
4.5 average rating
S
Sigalit
🇮🇱 · January 2026
★★★★★
I wrote to Bigamart's customer support and they accompanied the process of reshipping the item until it finally arrived. I felt a genuine effort to solve the problem till it was finally solved.
V
Verified buyer
🇦🇺 · November 2025
★★★★★
The package was here in Australia from England in a few days — so quick! Something was missing and they refunded it straight away. Pretty happy with these guys.
Showing 1–2 of 10 reviews
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