linklemming
Well-Known Member
Well I spent too much time researching this and just decided to bite the bullet on a new build.
I did spend a full day playing with the motor simulator at Grin Technologies comparing the GMAC10t to the BBSHD for various riding scenarios (about 20). The bottom line was that the GMAC10t was more efficient for all the riding I typically do up until a 6% grade at which point the BBSHD pulled ahead. The BBSHD could be more efficient in many of these situations if I used a super high cadence like 130+(the BBSHD can struggle at lower human limiting cadence) but thats not how I ride. Even at grades up to 15%, while the MAC10t wasnt as efficient and could overheat, I dont ride grades at that level for very long (I do encounter 20-30% grades every few rides but only for short periods). I actually wrote a document on this just to help me summarize my thoughts but it would stir up alot of controversy if I post it here. This analysis matched my experience riding my GMAC10t for the last 6 months. My rides are an average of many conditions and the GMAC10t is just the best solution overall.
In the end the MAC10t was the winner for all the rides i currently do from my house. While having an identical setup on a second bike makes alot of sense in many ways, I decided to go with the BBSHD (without the beloved torque sensing) initially. If I cant get the Bafang settings to my satisfaction, I will transition to a Grin Phaserunner and Cycle Analyst 3. If I go this route, comparing the mac10t(hub motor) to BBSHD (mid drive) could be interesting
If I decide to venture more into the steeper rides available around where I live, no questions that the BBSHD is the ticket.
So far:
Surly 700c Bridge Club(BC) in Black (Its a miracle I found this bike, probably last one in the USA), arrived today
BBSHD kit from Luna (seemed the cheapest)
52V Luna Wolf Battery using 30Q cells
Eggrider Display
Lekkie 42t chainring
Not sure which bike the BBSHD will end up on. The troll is probably is a better fit for the BBSHD and the GMAC will be better on the BC. I will provide more details on this in future posts.
The BC arrived today (Fedex delivers on sundays now). Thanks to Nashbar for the quick shipping.
FIrst thought on the BC is that it is a lot leaner bike than the troll. The BC is known as a light tourer and the Troll is designed to tour anywhere. Its very obvious in the construction. The Troll is pretty stiff so a more compliant bike will be welcome.
I will try the original 29 wheels with some wider tires than the stock 41mm. either smartsams in 29x2.1 or Marathon Plus MTB in 29x2.1.
That being said, I have ordered the parts to build my own wheels which will hold 27.5x2.6 Smart Sams and/or Johhny Watts.
Here is a initial pic of the BC
I did spend a full day playing with the motor simulator at Grin Technologies comparing the GMAC10t to the BBSHD for various riding scenarios (about 20). The bottom line was that the GMAC10t was more efficient for all the riding I typically do up until a 6% grade at which point the BBSHD pulled ahead. The BBSHD could be more efficient in many of these situations if I used a super high cadence like 130+(the BBSHD can struggle at lower human limiting cadence) but thats not how I ride. Even at grades up to 15%, while the MAC10t wasnt as efficient and could overheat, I dont ride grades at that level for very long (I do encounter 20-30% grades every few rides but only for short periods). I actually wrote a document on this just to help me summarize my thoughts but it would stir up alot of controversy if I post it here. This analysis matched my experience riding my GMAC10t for the last 6 months. My rides are an average of many conditions and the GMAC10t is just the best solution overall.
In the end the MAC10t was the winner for all the rides i currently do from my house. While having an identical setup on a second bike makes alot of sense in many ways, I decided to go with the BBSHD (without the beloved torque sensing) initially. If I cant get the Bafang settings to my satisfaction, I will transition to a Grin Phaserunner and Cycle Analyst 3. If I go this route, comparing the mac10t(hub motor) to BBSHD (mid drive) could be interesting
If I decide to venture more into the steeper rides available around where I live, no questions that the BBSHD is the ticket.
So far:
Surly 700c Bridge Club(BC) in Black (Its a miracle I found this bike, probably last one in the USA), arrived today
BBSHD kit from Luna (seemed the cheapest)
52V Luna Wolf Battery using 30Q cells
Eggrider Display
Lekkie 42t chainring
Not sure which bike the BBSHD will end up on. The troll is probably is a better fit for the BBSHD and the GMAC will be better on the BC. I will provide more details on this in future posts.
The BC arrived today (Fedex delivers on sundays now). Thanks to Nashbar for the quick shipping.
FIrst thought on the BC is that it is a lot leaner bike than the troll. The BC is known as a light tourer and the Troll is designed to tour anywhere. Its very obvious in the construction. The Troll is pretty stiff so a more compliant bike will be welcome.
I will try the original 29 wheels with some wider tires than the stock 41mm. either smartsams in 29x2.1 or Marathon Plus MTB in 29x2.1.
That being said, I have ordered the parts to build my own wheels which will hold 27.5x2.6 Smart Sams and/or Johhny Watts.
Here is a initial pic of the BC
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