Announcement

Collapse
No announcement yet.

Picking the right chainring size

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    Picking the right chainring size

    Firstly I apologize if this has been asked before, and please point me in the right direction.

    My setup: BBS02 750W, 48V. Chainring is 48T, Rear cog is 14-28. Rim Size is 700C, Tire Size is 38.

    When I lift the rear wheel and max out throttle, Wheel spins at 21.1mph on 28T and 42.4mph on 14T. According to www.bikecalc.com/gear_speed the BBS02 would have to run at cadence of 151 for me to achieve those speeds. That seems to me awfully fast, and I feel like I'm taxing the BBS02 even in first gear.

    30T mighty mini appears to me too small, and might limit my top speed. I think 36T will be a better fit, is my only choice to get an adapter and race face narrow wide 36T chainring?

    #2
    Off the ground speed has no basis in reality. Most calculators are pretty close to ground speed. Karl and others like the big chainwheels on bbs02 I think they're a recipe for an overheated motor. These motors like high rpm's. I think the readily accessible 42T are a great fit.especiall with 11T-34T

    Comment


      #3
      I agree with Louis - a 42T front and 11-34T is what I fitted on my BBS02 750W and, IMO, it's the best all around combination for uphill torque and speed on the flat. I tried a 36T chain ring on an adapter and not only was the chain line crap but I always felt like the peddle cadence was too fast. With 42-11, I can comfortably pedal up to the motor cut off at ~50kph.

      Comment


        #4
        With a 36 tooth on front of my BBS02 and an 11-34 cassette, my mountain bike will pull wheelies in 1st and 2nd gears. The 44 tooth that came with it wasn't bad on the road.

        Comment

        Working...
        X