Major step:
1. Shimano Deore M615 38Z/24Z Black 175 mm crankset (Double chain ring)
2. MKS MM Cube EZY clipless pedals
This is true increment in the power if cycling (even with with trailer) in the mountains or/and if breaking a way through frozen mixture from dirt, snow and ice.
Why 175 mm and not 170? It is not easy for tall People on Brompton, even with long seatpost. Additional 5 mm is one big win.
The original Brompton BB was removed and replaced by shimane hollowtech II. You can not compare hollowtech with original BB. Hollowtech is very stiff and bearings are much better, compared to original. Simple to install. Used Park Tool tools to remove the original and to install the new one BB.
The wisher between hollowtech BB and the frame has to be adapter to meet acceptable chainline. I used one provided by http://tillercycles.co.uk/. He provided it as part of his "Shimano Alfine 39t chainset" Brompton gearing upgrade.Two standard shimano wishers (crankset includes three wishers) are installed on the left BB side.You can see installed SA 8 speed gears with modified chain tensioner (provided by http://tillercycles.co.uk/).
I shall provide better description about this update.
It is 16 speed now. But it is still manual change and gears do overlap. Effectively it is three new lower gears.
1. Shimano Deore M615 38Z/24Z Black 175 mm crankset (Double chain ring)
2. MKS MM Cube EZY clipless pedals
This is true increment in the power if cycling (even with with trailer) in the mountains or/and if breaking a way through frozen mixture from dirt, snow and ice.
Why 175 mm and not 170? It is not easy for tall People on Brompton, even with long seatpost. Additional 5 mm is one big win.
The original Brompton BB was removed and replaced by shimane hollowtech II. You can not compare hollowtech with original BB. Hollowtech is very stiff and bearings are much better, compared to original. Simple to install. Used Park Tool tools to remove the original and to install the new one BB.
The wisher between hollowtech BB and the frame has to be adapter to meet acceptable chainline. I used one provided by http://tillercycles.co.uk/. He provided it as part of his "Shimano Alfine 39t chainset" Brompton gearing upgrade.Two standard shimano wishers (crankset includes three wishers) are installed on the left BB side.You can see installed SA 8 speed gears with modified chain tensioner (provided by http://tillercycles.co.uk/).
I shall provide better description about this update.
It is 16 speed now. But it is still manual change and gears do overlap. Effectively it is three new lower gears.
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