hi all
my first post so hope I get all the info down you all need (apologies for the length) and thanks in advance for any advice.
I have 5.5 miles to commute from home to station to catch london train. this is flat with undulations, no big hills, around 80% on good cycle paths where speed restriction is not an issue. I need to do this as fast as possible as I am comparing this to in the car which I can do in about 12 mins, at an average of 35mph. If I have to do it really slowly its not worth it (Already getting up really early!) . I then have 1.5 miles to do in london at the other end.
I'm 95kg, 6ft, long limbs, fit recreational but not club cyclist, I can do the same trip in 25 mins or less on the road bike but that means hot and sweaty. I need to do it in not much more than 20 mins in a suit for the commute...so 18-20 mph needed.
option 1: large frame e-bike conversion to leave at local station. In london, use boris hire bike / catch bus / walk / leave an old bike overnight at euston (there are lots of options).
option 2: folding e-bike to ride at both ends and take on train in the middle (has to be a folder to be allowed). But (its a big but) the folder will need to "ride big" (more later).
I've borrowed a whoosh sirocco cdl (http://wooshbikes.co.uk/?sirocco-cdl) from a family member to test the concept. It gets me there in just about the right time and non-sweatyness, so I know that an e-bike will work for me but I have a couple of issues with this particular bike that may help indicate my needs:
- rear rack battery + my bag on top of the rack makes it really rear end heavy, I have to really slow it down for corners otherwise I am convinced I will lose the back end, I have felt "wobbles".
- this particular crank drive seems unsophisticated. I like to flick between cogs to get my cadence right, its very "crunchy" on the gears as it doesn't shift nicely unless you manually depower before shifting.
- brakes are very basic - low end mech front disk, v on the back (doesn't matter so much) making me very cautious about my braking points.
I own a potential donor bike for option 1, a 2014 giant roam zero hybrid, that may well become surplus to requirements. This has 3x10 full deore, good hydraulic discs and a basic hybrid front fork. So I could convert that. The issues I can see are
- rear hub motor - need one that will take a 10x cassette, most seem to be setup for low end freewheel. Rear disc will almost certainly foul on hub so will need larger rotor and caliper moving. maybe I won't like the weight at the back.
- crank motor - would probably need a reasonably sophisticated (= expensive?) one to give me the right feel, but should give me the best weight distribution for bike handling? happy to lose my 3x on the existing front crank.
- battery - has to be seat or down tube mount to keep weight distribution low
- probably the cheapest option as only buying conversion kit (plus labour, would not trust myself to DIY this) not a whole bike..
option 2 is to buy a folding e-bike (I don't currently own any kind of folder).
having ridden a few (reise and muller birdy conversion, raleigh stow-eway, a2b kuo+ , a2b boost, volt metro), the only one that came close to feeling nice was the Tern Vectron, for two reasons:
- I have a reasonably forward riding position, I am not a serious roadie but on the other hand I definitely don't like to sit up and beg. I need at least 27" saddle-to-bars. most folders being "one-size-fits-all" are 23"-25" which makes me feel completely squashed and gives me a dire twitchy handling feel - I simply would not buy any folding bike that is built like this. I have not yet found any folder that has any capability to put a "forward reaching" full-size bike stem on - they all adjust up and down but not forwards and back, and the stems are usually designed as a fixed part that you can't swap.
The only folder I've seen is the tern with its swinging adjustable one, that does get me to the magic 27" mark.
- it has proper bike components where it matters (good hydraulic discs) and not where it doesn't (I don't care about a suspension fork, for example).
- the bosch crank drive motor on the tern felt "just right" for my riding , felt very intuitive and it gave me power when I wanted it and not when I didn't. Everything else (including the borrowed whoosh) seems laggy in both the power on and the power off.
- 20 inch wheels minimum (it needs to be comfortable at 18-20 mph) so no bromptons or similar.
However, the vectron is 3 grand, which is way over budget - around a grand is where I want to be. bearing in mind I could buy a 2nd hand renault zoe CAR for 5 grand and it would get me to the station on electricity in much more comfort!
any thoughts appreciated.
cheers
my first post so hope I get all the info down you all need (apologies for the length) and thanks in advance for any advice.
I have 5.5 miles to commute from home to station to catch london train. this is flat with undulations, no big hills, around 80% on good cycle paths where speed restriction is not an issue. I need to do this as fast as possible as I am comparing this to in the car which I can do in about 12 mins, at an average of 35mph. If I have to do it really slowly its not worth it (Already getting up really early!) . I then have 1.5 miles to do in london at the other end.
I'm 95kg, 6ft, long limbs, fit recreational but not club cyclist, I can do the same trip in 25 mins or less on the road bike but that means hot and sweaty. I need to do it in not much more than 20 mins in a suit for the commute...so 18-20 mph needed.
option 1: large frame e-bike conversion to leave at local station. In london, use boris hire bike / catch bus / walk / leave an old bike overnight at euston (there are lots of options).
option 2: folding e-bike to ride at both ends and take on train in the middle (has to be a folder to be allowed). But (its a big but) the folder will need to "ride big" (more later).
I've borrowed a whoosh sirocco cdl (http://wooshbikes.co.uk/?sirocco-cdl) from a family member to test the concept. It gets me there in just about the right time and non-sweatyness, so I know that an e-bike will work for me but I have a couple of issues with this particular bike that may help indicate my needs:
- rear rack battery + my bag on top of the rack makes it really rear end heavy, I have to really slow it down for corners otherwise I am convinced I will lose the back end, I have felt "wobbles".
- this particular crank drive seems unsophisticated. I like to flick between cogs to get my cadence right, its very "crunchy" on the gears as it doesn't shift nicely unless you manually depower before shifting.
- brakes are very basic - low end mech front disk, v on the back (doesn't matter so much) making me very cautious about my braking points.
I own a potential donor bike for option 1, a 2014 giant roam zero hybrid, that may well become surplus to requirements. This has 3x10 full deore, good hydraulic discs and a basic hybrid front fork. So I could convert that. The issues I can see are
- rear hub motor - need one that will take a 10x cassette, most seem to be setup for low end freewheel. Rear disc will almost certainly foul on hub so will need larger rotor and caliper moving. maybe I won't like the weight at the back.
- crank motor - would probably need a reasonably sophisticated (= expensive?) one to give me the right feel, but should give me the best weight distribution for bike handling? happy to lose my 3x on the existing front crank.
- battery - has to be seat or down tube mount to keep weight distribution low
- probably the cheapest option as only buying conversion kit (plus labour, would not trust myself to DIY this) not a whole bike..
option 2 is to buy a folding e-bike (I don't currently own any kind of folder).
having ridden a few (reise and muller birdy conversion, raleigh stow-eway, a2b kuo+ , a2b boost, volt metro), the only one that came close to feeling nice was the Tern Vectron, for two reasons:
- I have a reasonably forward riding position, I am not a serious roadie but on the other hand I definitely don't like to sit up and beg. I need at least 27" saddle-to-bars. most folders being "one-size-fits-all" are 23"-25" which makes me feel completely squashed and gives me a dire twitchy handling feel - I simply would not buy any folding bike that is built like this. I have not yet found any folder that has any capability to put a "forward reaching" full-size bike stem on - they all adjust up and down but not forwards and back, and the stems are usually designed as a fixed part that you can't swap.
The only folder I've seen is the tern with its swinging adjustable one, that does get me to the magic 27" mark.
- it has proper bike components where it matters (good hydraulic discs) and not where it doesn't (I don't care about a suspension fork, for example).
- the bosch crank drive motor on the tern felt "just right" for my riding , felt very intuitive and it gave me power when I wanted it and not when I didn't. Everything else (including the borrowed whoosh) seems laggy in both the power on and the power off.
- 20 inch wheels minimum (it needs to be comfortable at 18-20 mph) so no bromptons or similar.
However, the vectron is 3 grand, which is way over budget - around a grand is where I want to be. bearing in mind I could buy a 2nd hand renault zoe CAR for 5 grand and it would get me to the station on electricity in much more comfort!
any thoughts appreciated.
cheers