30mph bike options?

amigafan2003 · Mar 20, 2014

The first one is just an 8fun BBS kit - that you can get for around £260 delivered from various chinese vendors (greenbike kit, bms battery, people on aliexpress etc) and throw in a ping battery you're looking at £500 for the kit. The question you've got to ask yourself is the rest of the bike worth £900? I guess not - probably £250 tops. You could buy a real nice bike for £500, buy the kit (which is dead easy to install - just make sure the donor kit has cable brakes, not hydraulics) for £500 and you'll have a reall nice bike for £1k, but you want to look at the 48v750w BBS02 kit if you want to do 30mph. The 36v350w kit is good for 20mph.

If you've got £1800 though, the Haibike would still be a be a good buy but personally, I'm not convinced the Hiabike is worth £700 more than a similar spec'd bike with an 8fun kit (the Haibike without the motor is basically a £600 bike).

Deleted member 4366 · Mar 20, 2014

I agree. The top one looks a bit expensive. Also the battery might be a bit under-powered for the motor. I'm not sure of the current rating of the 36v 500W motor. I've seen both 15 and 18 amp 250w ones, so it must be 25 amps, which is much too much for your average 36v 10aH battery. He mentions an up-rated BMS, but not the cells. You could get a niced used Carrera Kraken for £250 with hydraulic brakes and forks, then add your own BBS01 kit and a decent battery for about £600, which would give a much better bike for £500 less. With the Xipi bikes, it's all down to price, but why would you want to buy something used when you can get all the stuff new from China so that you know what you've got?

Clockwise · Mar 20, 2014

Another vote for build from scratch for that money. I wouldn't even go with a new bike and strap a kit to it would build it from parts as you likely need to swap wheels, remove bb to add sensors and generally mess with it more than assembly of a new bike when it's delivered to add the kit.

Martin@e-bikeshop · Mar 20, 2014

Hi,

Any of my Bosch powered eBikes delivered with our dongle can do this.

Visit the website in my signature or feel free to call to discuss the options and what's going to suit you best.

Regards
Martin

Artstu · Mar 20, 2014

Martin@e-bikeshop said:
Any of my Bosch powered eBikes delivered with our dongle can do this.

Not strictly true, I imagine there a lot that don't have high enough gearing for those who haven't got a 140 rpm cadence. and will be very different to his current 1000 watt beast.

I'd take a Bosch bike any day, but it won't suit everyone.

Clockwise · Mar 20, 2014

Artstu said:
Not strictly true, I imagine there a lot that don't have high enough gearing for those who haven't got a 140 rpm cadence. and will be very different to his current 1000 watt beast.

I'd take a Bosch bike any day, but it won't suit everyone.

He lives near a massive hill.

Artstu · Mar 21, 2014

Clockwise said:
He lives near a massive hill.

I'm surrounded by them. Your point is ?

Deleted member 4366 · Mar 21, 2014

If you like to to live fast and die young, it'll be perfect for you.

Do you think that those brakes are going to stop you from 35+mph? For that sort of speed, you need hydraulic discs. Then you need decent tyres sothat you can maintain grip under heavy braking. I wouldn't go on a 20mph ebike unless it's got a disc brake of some sort on the front. The other problem will be trying to pedal past 15mph. I bet it has a 14T rear sprocket and a chainwheel of 44T maximum. Check those sizes with the vendor. For 30 mph,you need at least a 11T/52T arrangement. I note that the advert says 1000w motor. Then at the bottom it says EN15194 motor, but EN15194 doesn't allow 1000w motors!

I don't like to be too negative, but building an electric bike takes a lot more than bolting the biggest motor to the back wheel. The bigger the motor, the more care you have to take with handling (balance), grip and stopping.

amigafan2003 · Mar 21, 2014

That bike hasn't even got a torque arm on it.

trex · Mar 21, 2014

the vendor said:

http://www.ebay.co.uk/itm/171274512880

It hasn't been thrown together and built wrong like some I see on here.
We sold many of these, as you can see from our feedback, very happy customers!

There should be a law against these traders.

Deleted member 4366 · Mar 21, 2014

amigafan2003 said:
That bike hasn't even got a torque arm on it.

I think you're right. I hope the regen isn't enabled!

amigafan2003 · Mar 21, 2014

There should be a law against these traders.

Why? What's he doing wrong?

trex · Mar 21, 2014

he entices you to this bike with the promise of a very high speed of a DD motor.
Let's say you bought it - no reason not to give it a quick test ride. Perfect, you leave the trader a very good feedback.
Two weeks later, you had to do an emergency stop on a normal road, the bike sent you over the handlebars, he blames you for riding illegally, you are supposed to stick to EN15194 on the road because the bike is built to that standard. See the get out of jail card?
He pretends to be a professional, yet, his bike is not safe for the speed he advertised.
Bikes exceeding 20-23mph can kill and should be built by specialists.

amigafan2003 · Mar 21, 2014

Going over the handlebars would imply the brakes are adequate ;-)

I could go out tomorrow and by a non-road legal racing Westfield - it'd hardly be the sellers fault if I got nicked driving it back home would it?

Robb9771 · Mar 21, 2014

I have one of Martins Haibikes with a dongle and 30mph is very easily achieved. I would agree that a quality frame, wheels and brakes are essential if you want to be safe. Just breaking hard from 30mph can put massive strain on the brakes , headset and forks so I wouldn't take a chance on anything with cheap components. Bosch, Haibike, KTM etc have put a lot of time in R&D to make these work well and safely - yes they are comparably expensive but quality and safety comes at a price.

Martin@e-bikeshop · Mar 21, 2014

Artstu said:
Not strictly true, I imagine there a lot that don't have high enough gearing for those who haven't got a 140 rpm cadence. and will be very different to his current 1000 watt beast.

I'd take a Bosch bike any day, but it won't suit everyone.

Hi Artstu,

Given that I have all sprocket sizes in stock to achieve this. I play with this sort of thing on a daily basis.

Regards
Martin

EddiePJ · Mar 21, 2014

If you are thinking about buying the used Haibike, then I'll throw another option into the equation for £300.00 less, approx 50miles less and with the 400wh battery. My Haibike.

You would still need to buy a dongle for either bike.

The mid drive for road use just doesn't float my boat, and selling it would free up money to buy something that does, although I'm not really all that fussed about whether it sells or not, it's there if you fancy it.

It also has a 56cm frame, which definitely only suits a rider of 5'10" plus. Any smaller and I doubt very much that you would get on with it.

To save anyone else bringing the following up..
Also bear in mind that both bikes are German imports, so unlike Martin's Haibikes, you won't have UK warranty cover.

Rear rack not included.

30mph bike options?

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