New dahon - Jifo 16

[cwah]

Ok, you're always very helpful and both you and d8v3h are real mentors for me!!

I want a bike I can carry through the 2 stairs to my flat, that's able to reach 30 mph max speed (for long flat road) but most of the time I'd be around 20-23 mph. Good acceleration because there are so many light in big town.

 

[Deleted member 4366]

How do you install 135mm motor on a 130mm fork dropout? And why do you want to install it on front wheel and not on rear wheel. It would be much more stealthy behind.

You put the anti-rotation washers on the outside instead of the inside and just use a thin washer on the inside. That gains your about 6 to 8mm. Then you can stretch the drop-outs by at least 10mm on a 26" wheel and probably about 6mm for a 20" wheel with no detrimental effect on the frame. You can probably go further, but obviously the further you go the more then risk of something failing later. The Uno has quite a stiff rear frame, so I don't know how far it'l go, but I'd say at least 5mm. Next, you can use a 5speed gearset, which is a bit thinner and then you can shorten the spacer on the axle to gain the difference and then dish the wheel a bit to get the rim central.

The BPM motor has a big axle, so you have to file the drop-outs bigger and deeper, so you have to make sure that you choose a bike with a lot of metal around them. I think the Ezee motor has a thinner axle, but you'd need to check.

I got my Dahon today and tried it out down to the Supermarket. I can't see it being much fun at 30mph, Cwah. I think you need to think again about your donor bike. I reckon one like Morphix's would be a lot better, or you need to think about lower speed. I'd say that anything over 20mph is going to be dodgy.

 

[cwah]

What I'm planning to do is to have 3 speed switch like my actual bike. 30 mph would be the max setting. But most of the time I could stay at the lowest speed? That's what I'm doing now on my full size folding bike when I need to save batteries consumption.

It's a bit like car, you can always go faster than the limitation, but it doesn't mean because you can you'll do it.

Do you know if e BPM could fit the jetstream? Maybe it's a good value to get this bike because it doesn't loose too much value over time. In 2 years I'll still be able to sell it at half price.

 

[jerrysimon]

I got my Dahon today and tried it out down to the Supermarket. I can't see it being much fun at 30mph

Interesting Dave, don't want to hijack the thread (feel free to start a new one) but would love to see some more pictures of it and hear what you think.

Have you ridden a Brompton ? how does it compare ? what's the fold like etc. ?

Regards

Jerry

 

[cwah]

I'd love to hear the comparison. I've never rode a brompton. From my experience with the dahon jetstream 2011, I didn't feel to much the advantage of the suspension compared to my full size bike. But I suppose it's better to have suspensions at higher speed.

Any feedback d8v3h? Like / dislike the bike? Prefer a smaller one?

 

[Deleted member 4366]

Interesting Dave, don't want to hijack the thread (feel free to start a new one) but would love to see some more pictures of it and hear what you think.

Have you ridden a Brompton ? how does it compare ? what's the fold like etc. ?

Regards

Jerry

Never ridden a Brompton, so I can't compare. I'll start another thread for the build, but I'm not going to do anything exciting. I'm thinking of a low-powered motor of 201rpmfor for a max speed of 12mph, but good climbing. I mightl up the volts to 44v for a bit more speed if it's too slow, and I want to use 5aH lipos for light weight. The shops are all down a steep hill and I'm heavy, so I need low gearing to get up the hill with a lot of heavy shopping. This smaller folding bike is a lot easier to get in and out of doorways than a mountain bike, so more convenient for short trips. I'll still use my Giant BPM for commuting. The folding method is very clever, but still a bit awkward, so I probably won't use it that much, but, when I park it in my hall-way, I can just fold the handlebars down so that it's very narrow and doesn't get in the way. I also want to use it when I get my car serviced and perhaps when I go sailing in my sail-boat in the summer.