★★★★★ 5
Make sure you know the size
Yes worked like a charm
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 5, 2026
SpeedBox 1.4 B.Tuning for Bosch SX
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
SpeedBox 1.4 B.Tuning for Bosch SXSpeedBox 1. 4 B. Tuning for Bosch SX (Smart System + Rim Magnet) Advanced tuning chip for Bosch Performance Line SX motors (BDU3142, BDU3143) with simplified installationno magnet simulator required. Enables unlimited speed (max 35 km h recommended) and connects to the SpeedBox App for real time ride data. Activation via App, WALK function, or + + buttons. Compatible with Bosch Rim Magnet setups and current software versions. Note: Not compatible with
Quick Dispatch:
Your SpeedBox 1.4 B.Tuning for Bosch SX 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 B.Tuning for Bosch SX ships.
Need Help?
Questions about SpeedBox 1.4 B.Tuning for Bosch SX, 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 B.Tuning for Bosch SX in your area.
Get Shipping Estimates
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
You may also like
SpeedBox 1.0 for Brose Specialized
199.50
Sag and Travel Indicator Reverse Components
39.95
SpeedBox 3.0 B.Tuning for Giant
289.50
SpeedBox 3.0 for Yamaha (PW-X, SE, TE, CE, X2)
214.50
SpeedBox 1.2 B.Tuning for Bosch (Smart + Rim)
392.50
SpeedBox 1.2 for Bosch (Smart System + Rim Magnet)
341.00
Speedbox 2.0 for Yamaha
138.00
4.4 ★★★★★
Based on 2436 reviews
Sort
Product Reviews
★★★★★ 5
Great fitment, made changing the oil filter easy
Perfect fit for my m760i oil filter housing.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 24, 2026
★★★★★ 5
s tier quality
superior quality, single cast aluminum 👍
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 2, 2026
★★★★★ 4
Too Tight but It Works
It doesn't really sit on very well to be honest, it tends to sit TOO tight in my opinion. Taking it off can be a hassle but at least it gets the job done, durability is good, finish is great, obviously easy to use.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 28, 2025
★★★★★ 5
BMW F25
Saved me when tried to change the oil. Great price
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 23, 2026
recommand products
Arthur Conan Doyle's The Exploits of Brigadier Gerard - John Murray 1961
14.99
Flower Growing for Ungardeners by Ethelind Fearon - Herbert Jenkins, 1963
19.59
Ordeal by Innocence by Agatha Christie - Collins
11.75
The Wind in the Willows by Kenneth Grahame - Methuen, 1963
17.99
Victor Hugo's Collected Works, 1881-2 - 39 Volumes in French
292.50