Matt A
Member
Why the high end gear ratio of the Nuvinci is not ideal, I think it is enough. After reading your post I opened up the Nyon Fitness screen with the Cadence readout and found that the cadence in the highest gear ratio required to maintain 26.5-27mph was 85 for me. If yours is significantly more than that, I would consider having a shop take a look at your NuVinci, a shop that really really knows the Nuvinci. What worries me is that your Shift recommendations are going off while in the highest gear, this was my first clue that something was wrong with the Nuvinci. The bosch shift recommendation should not appear when you are already in the highest gear. This happened to me along with the spinning at high speeds which lead me to realize something has to be wrong.The frames of the R&Ms do seem well put together and strong. People comment to me about the sturdiness of the Charger so they'd probably be really surprised to see the Delite. I guess the welds are always going to be the weak spots on any bike frame.
That gear ratio thing I had mentioned before: I don't have hills on my commute just a gradual grade change. On the way to work I am descending a bit and on the way home ascending. When I'm on an open stretch and have good pavement I run out of gear range and the only way to increase my speed is to increase the assist level. Its like using the assist level as another gear I guess. In fact, I have the shift suggestion thingy turned on in the Intuvia and sometimes it throws me the arrow to shift when I actually can't shift anymore. I've maxed out my gear range and the Intuvia is telling me to shift. On good pavement I feel like I have enough leg and lung power to get the bike to 28 with only Tour mode. But I don't have the gear range to get it there. I actually haven't hit 28 mph yet on this bike. My max is 27.5 and that was a slight ascension. If I am maxed out on gear and I up the assist to Turbo, I just feel like I'm spinning ridiculously fast. There were some suggestions on this forum and even my LBS mechanics suggested that maybe I could change the front or back rings to alter that ratio - but I haven't really explored that avenue yet.
A couple of the 2nd commuter bikes I am considering are 20 mph bikes. I'm really curious as to whether the higher torque motor and lighter bike but lower top speed might actually make my commute more efficient (given all the start/stop riding I have). I mentioned it before but very little of my total commute is spent at speeds over 20 mph. I have a couple of stretches where I get there but on those I'm usually cruising around 22-23 mph and never hitting the higher top speeds of 28 mph. On the commute home I sometimes keep the speed down a bit on the open stretches trying to stay right around 20 mph in order to conserve battery. I wish my area had a strong e-bike presence wherein I could borrower a bike for a day or two to test out on an actual 35 mile work commute. Its one thing to test ride a bike but totally another to sit on it for a couple of long rides over multiple days with your gear/wind etc.
It would be nice to have more ebike presence everywhere for test riding and reviews. If you rarely go over 20mph then I would get the CX drive, however one of your goals is fitness so the extra torque is something I feel you would never utilized. As you know, max torque is achieved at high RPMs, and if you are never doing top speed in Turbo, then you will never see that 75nm of torque. I am no expert so please don't take this as fact, but I absolutely highly highly doubt that the CX drive is going to hit the 75nm of torque unless you are either 1. close to top speed or 2. going up an extremely steep grade. I would opt for the optional higher speed even if I would rarely use it. Also, just as our HS bike starts to cut the motor down at 26mph, the CX drive I'm sure will start cutting your motor power out significantly at 18mph.