CST 9x2 {-6.1} Tube 45/90 degree

• The CST 9x2" tube is ideal for makes/models such as:
  • Dualtron Popular and split rim variants of Dualtron Mini and Togo.
    • These models adopt a 6.1" rim. The Dualtron Popular introduced an 70/50-6.1 tyre (2.75" wide, near 9" diameter) which is typically retrofitted to Dualtron Mini in lieu of the original Dualtron Branded CST 8.5x2 tyre. This tube suits both of those tyres. Use 90 degree valve in the rear motor hub, 45 in the motor-less front.
  • Bolzzen Commando 4818, which is the entry level model of the two TNE (Teverun) blue/black coloured models. It has 600w motors with 6" rim with factory fitted 9x3.00-6 tyre (see notes). Use 90 degree variant.
  • Models with 230x50 tyre such as Xiaomi MI3, MI3 Lite & MI4 Lite.
  • Apollo Go, which has a troublesome stock 9x2 {-6.1} Yanxing CY-344 self-healing tyre running tubeless operation. This tyre often splits / cracks / tears on sidewall even after limited use. For this model, eSN recommends considering the tubeless CST 9.5x2.5 {-6.1} where clearance allows, or the tube type CY-276 which is available from Ride Electric and also EcoMotion who suggest the 9x2{-6.1} tyre also suits:
    • Segway Ninebot: E22, E25, E45
    • Xiaomi: M365, M365 Pro, Mi 3, M365 1S, M365 Pro 2
    • GOTRAX: GXL V2, XR
    • Hiboy: S2
    • Other scooters supporting 9x2-6.1 tyre size.
• Choice of 45 and 90 degree bend, 80 degree tilt. The 45 presents more like 60 degree.

Notes:

1. eSN also stocks the straight version, see the CST variant on the 8.5x2 (50-156) Tube Straight / 45 degree [CST | Superbsail | JY-04] product page.
2. This tube presents similar to the CST 8.5x2" tube and often fitted in lieu of 8.5x2 nameplate tubes, suggesting it is universal for 8.5" and 9" tyres for models with 6.1" rims, including the common 8.5x2 "Xiaomi M365" tyres. eSN also stocks 50/75-6.1 (9.05x2) tyres from Chao Yang (Tubeless) as well as the Jingyuan which has semi-off road tread.
3. Regarding Bolzzen Commando, (blue/black TNE models) with 4818 model (2x600w motors) using a 9x3.00-6 tyre: this tube is a much better option than the often stock 10x2-2.5" tubes. These tyres typically run tubeless operation in most eScooters however the Bolzen Comando 4818 is understood to require tube. As precise tubes are not manufactured in the appropriate size, eSN recommends using this tube. Those models can also accommodate Tuovt 9x3.0-6 tyre (note the .0) and CST 9x2.50-6 Road Tyre [CM560], bother are considered better tyres than the stock 9x3.00-6. Models with 10" tyres (e.g. Commando 4823 Elite) with fender spacer are best fitted with 10x2.5 size tube. 4818 owners can uplift to 10" with fender spacers similar to the TurboTight NAMI Klima Fender Spacer Kit. Image below shows the stock factory spacers.
   
4. For motor hubs typically 90 degree is adopted, non-motor hubs 45 degree.