ethirteen Turbocharger 104BCD 34T Avinox

e*Thirteen Turbocharger Race e*spec | 104BCD Spider plus 34T Bashguard | 34T Ring | Avinox | 55mm CL | 8mm Offset | Incl. 
Chainring, Bolts and Nuts | Sterling Silver/Black

The Turbocharger Race e*spec kit for Avinox motors delivers maximum drivetrain protection, chain security, and durability for compact e‑MTB systems. This complete assembly includes a 104BCD Spider, composite Bashguard, and a 34T AL7075 chainring with an 8mm offset for a perfect 55mm chainline. With the M4 narrow‑wide tooth profile and a rugged integrated design, it’s the ultimate upgrade for Avinox riders seeking impact protection and flawless chain retention.

Turbocharger Race e*spec | 104BCD Spider plus 34T Bashguard | 34T Ring | Avinox | 55mm CL | 8mm Offset | Incl. 
Chainring, Bolts and Nuts | Sterling Silver/Black

The Turbocharger Race espec Spider, Bashguard, and 34T Chainring kit* is engineered to give Avinox riders the highest level of drivetrain protection and chain security available for modern lightweight e‑MTB systems. Avinox motors leave the chainring exposed to impacts—especially on heavier e‑bikes that lack ISCG tabs. This integrated Turbocharger system solves that vulnerability with a rugged, lightweight, and fully compatible solution.

The kit combines a 104BCD forged‑and‑CNC’d AL7075 chainring, a reinforced composite Bashguard, and a precision‑machined 104BCD Spider. The Avinox version uses an 8mm offset to achieve a perfect 55mm chainline, ensuring smooth power transfer, clean shifting, and optimal drivetrain alignment.

The chainring features e*thirteen’s M4 narrow‑wide tooth profile, delivering exceptional chain retention and long wear life while remaining fully compatible with Shimano®, TRP®, and SRAM® 11/12‑speed drivetrains—including SRAM T‑Type. The compact, integrated aesthetic pairs cleanly with Avinox frames and maintains a sleek, modern look.

This kit includes everything needed for installation, plus spacers for running the Spider + Chainring without the Bashguard if desired.

Key Features

• Designed for Avinox motor systems


• 34T AL7075 chainring with 8mm offset


• Perfect 55mm chainline


• Integrated 104BCD Spider + Bashguard + Chainring assembly


• Composite Bashguard protects motor & drivetrain from impacts


• M4 narrow‑wide tooth profile for superior chain retention


• Compatible with Shimano®, TRP®, SRAM® 11/12‑speed (incl. T‑Type)


• Works with any 104BCD chainring for easy, low‑waste servicing


• Sleek Sterling Silver Spider with Black Chainring & Bashguard


• Turbocharger‑compatible Upper Slider available separately

Specifications

• Motor System: Avinox


• Chainring Size: 34T


• Offset: 8mm


• Chainline: 55mm


• BCD: 104mm


• Material: Forged‑CNC AL7075‑T6 (chainring & spider), composite Bashguard


• Color: Sterling Silver Spider / Black Chainring & Bashguard


• Weight: 220g (Avinox 34T)


• Drivetrain Compatibility: Shimano®, TRP®, SRAM® 11/12‑speed, SRAM T‑Type

Included

• 104BCD Spider


• 34T AL7075 Chainring


• Composite Bashguard


• Bolts, nuts & mounting hardware


• Custom spacers for Spider‑only or Spider + Chainring setups