SpeedBox 1.4 for Bosch SX (Smart System + Rim Magn

SpeedBox 1.4 for Bosch SX (Smart System + Rim Magn

Marsoni

M251S

$368.30

Get it in 3 business days with 1 day shipping. Friday, May 29

SpeedBox 1.4 for Bosch SX (Smart System + Rim MagnSpeedBox 1. 4 for Bosch Performance Line SX (4th Gen) Simplified installationno need for a separate magnet simulator. Designed for BDU3142 and BDU3143 motors mounted with two top screws. Enables unlimited speed (max 35 km h recommended). Activation via WALK button or + + combination. Tuning status indicated by 3. 5 2. 5 km h display values. Compatible with Bosch Rim Magnet setups only. Not compatible with standard magnets, ABS systems, or SpeedBox

Easy Shipping

Quick Dispatch:

Your SpeedBox 1.4 for Bosch SX (Smart System + Rim Magn orders ship within 1-2 business days.

Delivery Options:

Standard: 3-7 business days
Fast: 2-3 business days
Express: 1-2 business days

Order Tracking:

You'll receive a tracking link by email once your SpeedBox 1.4 for Bosch SX (Smart System + Rim Magn ships.

Need Help?
Questions about SpeedBox 1.4 for Bosch SX (Smart System + Rim Magn, sizing, or delivery? We're just an email away.

Live Shipping Estimates:
Enter your location at checkout to see available shipping methods and costs for SpeedBox 1.4 for Bosch SX (Smart System + Rim Magn in your area.

Get Shipping Estimates

Country Zip/Postal Code

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

A little large/long but good quality. I think my son is pretty average sized for an 8 year old. My fault for getting it last minute so we didn’t have time to get it fitted. The quality was better than expected especially for the price. He told me he was super comfortable in it so that was the biggest win! Shirt not included and he took his jacket off for the picture.

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on December 29, 2025

Verified Purchase

Daydre-Ann Allen Mitchell

Belleville, US

★★★★★ 5

Colour and Sizing are good

Color: Dark Green, Size: 6 Years, Color: Dark Green, Size: 6 Years

Very nice material. Sizes are accurate. I love it. I bought size 6 for my 7 year old son ( he's a little on the smaller size) and Size 12 for my 10 year old ( he's tallish and skinny) because I want them to last a few years.

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on June 1, 2026