MrLibraryMan
Member
- Region
- USA
About a month ago, I became the proud new owner of a Trek Allant+ 7S bike that I really enjoy riding just about every day on smooth surfaced streets in neighborhoods that are sometimes particularly hilly with some steep inclines. This e-bike is a pleasure riding especially since my new Trek bike is a Class 3, which is a vast improvement over my "old" Trek Lift, Class 1 e-bike. To add to the enjoyment of my new bike, I asked my LBS before leaving the store to update the firmware on the motor so that I could take advantage of the new 85Nm feature which I thought would help on the streets' hilly terrain. Well, so I thought...
From time to time I feel a slight, intermittent vibration coming from the Bosch Performance Speed Motor as I travel around 10-15mph (or faster) on level surface streets and on uphill surface streets. At first I thought it was the OEM tires, but discovered that they were not creating/contributing to the problem. It's not from the pedals either. The slightly annoying and irksome vibration is definitely coming from the Bosch motor.
Whenever I feel the subtle vibration from the motor, it tends to lessen or even disappear when I increase the mode from tour to sport or even turbo and while I'm in 3rd, 4th, or 5th gear. So my question is, is this slight and intermittent vibration an unintended indicator or warning that the motor is laboring or that it cannot adequately handle the demands I'm placing on it? Of course, if I am going up a hill, I'll drop to 3rd or 2nd or 1st gear to lessen the demands on the bike (and on me). (By the way, I weigh 215 lbs., and I don't have any heaving loads on the bike other than my Kryptonite New York U-Lock and a small frame bag for bits and pieces.)
I did some research before posting this conversation and discovered a potential reason for the slight vibration: There may be a damping foil omission that supposed to be between the frame and motor and that it may not be installed. Could that be causing the slight vibration or do I have defective Bosch motor? Or is there an adjustment I need to have my LBS tech make? I cleaned the chain, sprockets, and cassette and then oiled those components which gave some improvement, but it did not eliminate the problem (and just made me feel better about doing the maintenance LOL).
On a slightly different topic, since I always travel on smooth streets and often hilly ones, I never treat the bike as a mountain bike and I never pop any wheelies. That said, would there be an advantage to ask my LBS tech to have the eMTB mode turned on my bike?
Thank you all in advance for any suggestions you can offer.
David
From time to time I feel a slight, intermittent vibration coming from the Bosch Performance Speed Motor as I travel around 10-15mph (or faster) on level surface streets and on uphill surface streets. At first I thought it was the OEM tires, but discovered that they were not creating/contributing to the problem. It's not from the pedals either. The slightly annoying and irksome vibration is definitely coming from the Bosch motor.
Whenever I feel the subtle vibration from the motor, it tends to lessen or even disappear when I increase the mode from tour to sport or even turbo and while I'm in 3rd, 4th, or 5th gear. So my question is, is this slight and intermittent vibration an unintended indicator or warning that the motor is laboring or that it cannot adequately handle the demands I'm placing on it? Of course, if I am going up a hill, I'll drop to 3rd or 2nd or 1st gear to lessen the demands on the bike (and on me). (By the way, I weigh 215 lbs., and I don't have any heaving loads on the bike other than my Kryptonite New York U-Lock and a small frame bag for bits and pieces.)
I did some research before posting this conversation and discovered a potential reason for the slight vibration: There may be a damping foil omission that supposed to be between the frame and motor and that it may not be installed. Could that be causing the slight vibration or do I have defective Bosch motor? Or is there an adjustment I need to have my LBS tech make? I cleaned the chain, sprockets, and cassette and then oiled those components which gave some improvement, but it did not eliminate the problem (and just made me feel better about doing the maintenance LOL).
On a slightly different topic, since I always travel on smooth streets and often hilly ones, I never treat the bike as a mountain bike and I never pop any wheelies. That said, would there be an advantage to ask my LBS tech to have the eMTB mode turned on my bike?
Thank you all in advance for any suggestions you can offer.
David
