Bosch Classic Line/Classic Line+ e-bike gear kit (OEM: 1270020202 - 5515213021 - 1270020XXX)

“High-quality 2-piece gear for Bosch Classic e-bike engines – durability, precision and performance”

This gear, specially developed for 1st generation Bosch Classic engines, is the ideal choice for demanding e-bike riders who value quality and reliability. Made in Germany, it impresses with its particularly robust construction made of polyamide 12, which is reinforced with 15-20% carbon fiber. This innovative material combination guarantees exceptional stability and durability - even with intensive use.

The 2-part gear is mounted on the gear hub at the marked locations using 7 M5 stainless steel screws (T25). The gear is designed so that the power flow is optimal via the gear, while the disc serves as a fixation. This well thought-out design ensures efficient power transmission and guarantees a long service life.

Thanks to our precise manufacturing technology, we ensure that your electric bike runs reliably and stably at all times. This gear is an indispensable spare part that ensures the long-term performance of your e-bike and keeps it in top condition over the long term - for a safe and comfortable ride every time you use it.

ℹ️ Material ℹ️

• Our high-strength, modified polyamide 12 – long-chain and reinforced with 15-20% carbon fiber – offers up to 130% higher load-bearing capacity and stability than POM. This exceptional strength makes the material virtually indestructible and ideal for demanding applications where durability and reliability are crucial.

✅️ Compatibility ✅️

• Compatible with Bosch Classic Line/Classic Line+ e-bikes and other motors that use the gear with Gen.1 V1 according to OEM no.: 1270020202 & 551521302 or Gen.1 V2 according to OEM no.: 1270020XXX.

⚠️ Technical data ⚠️

• Outer diameter: 128.60 mm ± 0.25 mm
• Number of teeth (external gearing): 60T.
• Height: 13.15 mm ± 0.15 mm
• Heat resistant up to: approx. 205°
• Color: Black   
• The gearing on the Generation 1 V1 hub has 2 missing teeth (see red markings on the product photos).
• The gearing on the Generation 1 V2 hub has no missing teeth and is longer than that of the Generation 1 V1 hub.
• This guide will help you identify the differences between the gear versions and assist you in assembling the gear kit. Start guide (German)  Start guide (English)

✅️ Scope of delivery ✅️

• 1x Bosch Classic Line/Classic Line+ Gen.1 V1 gear KIT according to OEM no.: 1270020202 & 551521302 or Gen.1 V2 according to OEM no.: 1270020XXX (hub not included!).

 ℹ️ Installation instructions ℹ️

• Before assembly, make sure that the drive gear rotates smoothly. If it is blocked or very difficult to move, this may indicate foreign objects. In this case, we recommend dismantling the housing and cleaning it thoroughly to avoid future damage.
• The 2-part gear is mounted on the hub according to the assembly video. Pay attention to the markings on the components (can only be mounted in one position).
• Tightening torque of the screws: max. 2.0 Nm  (Medium strength threadlocker recommended)
• Support help via the "Online Shop Chat " function

Keep your e-bike in optimal condition with this high-quality spare part!