KMC - E-Bike (BOSCH GEN 4) Chainrings
SKU: 43121394425

KMC - E-Bike (BOSCH GEN 4) Chainrings

Sale price$38.78 Regular price$43.09
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Ships within 48 hours · Estimated delivery Jul 7 - Jul 12

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Description

KMC - E-Bike (BOSCH GEN 4) ChainringsKMC E BIKE (BOSCH GEN 4) CHAINRINGS A drive is efficient when chain and chainring work together perfectly. The most important factor here is an optimum form and force fit, which is created by a minimum of play between the drive components. Precision is the central KMC issue in the development of advanced drive components. For the Bosch Gen4 chainrings, for example, they designed a completely new tooth profile: It prevents the chain from falling off

KMC - E-BIKE (BOSCH GEN 4) CHAINRINGS

A drive is efficient when chain and chainring work together perfectly. The most important factor here is an optimum form and force fit, which is created by a minimum of play between the drive components. Precision is the central KMC issue in the development of advanced drive components. For the Bosch Gen4 chainrings, for example, they designed a completely new tooth profile: It prevents the chain from falling off without forcing it onto the teeth. The result is the perfect balance of power and smooth running with a long service life.

AFSG4-34T 
Chainring Bosch G4 Front 34T, CL 52mm, Black, 11/128" 

  • 34 teeth
  • Size: 1/2" X 11/128"
  • 52mm Chainline
  • Treatment: Hardened Chromoly steel
  • For Bosch 4 Systems
  • Direct Mount; 9,0mm offset
  • Perfectly matched to KMC chains - e1, e12, e11, e10, e9 and e8 chains
  • Maximum efficiency which saves battery
  • SHI-12 spd compatible

AFSG4-38T

Chainring Bosch G4 Front 38T, CL 50mm, Black, 11/128" 

  • 38 teeth 
  • Size: 1/2" X 11/128"" 
  • 50mm Chainline
  • Treatment: Hardened Chromoly steel
  • For Bosch Gen4 Systems
  • Direct Mount; 7,0mm offset
  • Perfectly matched to KMC chains - e1, e12, e11, e10, e9 and e8 chains
  • Maximum efficiency which saves battery
  • SHI-12 spd compatible
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 43121394425

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4.6 ★★★★★
Based on 865 reviews
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Randall S Jackson
Charlottesville, US
★★★★★ 5
JUST RIGHT
Color: 2024-2025 Black
PERFECT FIT WORKS AS ADVERTISED
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 27, 2026
J
Verified Purchase
Jose uribe
Lake Worth, US
★★★★★ 4
No encaja exactamente
Color: 2024-2025 Black
No encaja exactamente
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 28, 2026
S
Verified Purchase
SAW
Massapequa, US
★★★★★ 5
Fit and finish is great.
Color: 2024-2025 Black, Color: 2024-2025 Black
Looks just like the passenger side so now the cab looks submetrical. Only wish they were true grab handles but it is strong and secure. I did remove my stock speaker cover that has the JBL logo and placed it on the UltraEra pillar. Some work was involved.
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Reviewed in the United States on April 20, 2026
J
Verified Purchase
Juan A Gonzalez Skerrett
Houston, US
★★★★★ 5
El consumidor
Color: 2024-2025 Black
Le quedó fenomenal a una Tacoma Sport, 2025
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Reviewed in the United States on May 5, 2026
J
Verified Purchase
Jon Oz
Pawtucket, US
★★★★★ 5
Must have and should be standard.
Color: 2024-2025 Black
Not sure why these aren't standard, but a must have. Fits like factory and bolts on rock solid. Easy install and took me about 10 mins. Color matches trim perfectly. Just wish I could've swapped the speaker cover with the JBL marked cover, but the factory uses push tabs and not screws. I didn't want create any loose parts that would vibrate later. For the cost, it isn't a bad accessory. Worth it in my opinion.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 20, 2025

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