spinnanz

So I posted my intend build a while back, and a few said don't do it. You will die, the bike will break etc. Well after doing about 4000km on it, I'm not dead, it's not broken and it's been a ton of fun.

Initially it was 300w. That's been well and truly smashed.

Here is where It's at now.....

davester

Yer gonna die!!!

spinnanz

Technically correct, we all are!

tiger1964 

Sent a link to my old-bikes-suck and e-bikes-rule friends.

OK, now for someone to make an e-Penny Farthing.

noobinsf 

Looks like a fun conversion. Sorry to be a wet blanket, but 61kph (38mph) in the bike lane? The big dog + jogger moment seemed right out of a driver's ed video. Maybe a little less leadfooting in the future?

Chuck M 

It's hard for me to tell... Did you save that jogger from being attacked by the woman's dog?

spinnanz

No offence taken but I was off the throttle a full 10 seconds before being "behind" the runner and walker, at the time of passing I was doing 12kph so I don't really see an issue.

Generally when passing from behind I do about 15kph past and give the bell a ring prior. Kids and dogs I take an extra wide path away from, which was pretty well shown why in the video. Generally I'm doing 45-50, depending on the particular path and number of people.

spinnanz

Nah he was past her before I was. Ironically he's my neighbour. The dog got pretty close though!

squirtdad

if this is any thing like like the mups i uses, 50 kph or 30 mph would be way too fast for safety. yours may be different, with lower traffic or less clueless people

what are you doing for brakes to handle that speed?

This may be a fine line but I draw a big difference between pedal assist bicycles, where you have to pedal to start and keep moving, but get electric help with no throttle and hopefully a assisted top speed of 20mph or so and electric motorcycles, which pedals or not, don't need to be pedaling to start and keep going and have a throttle. the former are a great help to people who may not otherwise bike and the later should be treated like motorcycles and should not be on trails and mups at all, especially the idiot with that fat tire bike who does not slow for anyone...or the pack of one wheel riders.

spinnanz

Brakes are now from modern dual pivot calipers. This paired with modern alloy rims sees me with fairly decent braking.

As per my speed, 60kph is my maximum speed, in optimum conditions, ie smooth road, no other people, no pedestrian side roads etc.

bamboobike4

You’ll go blind!

gugie 

60 kph (37mph) on a MUP? Too damn fast regardless if you're pedalling or pushing a throttle. It's the reason motorcycles are outlawed on MUPs (and if you can hit 60kph, it's a motorized vehicle).

Sorry man, wrong forum to be bragging about this.

spinnanz

dont be sorry, I'm not.

If you can show me passing anyone at more than 20kph, I'd accept that, but I don't.

Me passing at 12kph is far less dangerous than the dog trying to bite the runner.




​

cudak888 

Generally agree about those speeds on an MUP in general - but every location is different, and this path, in this specific instance, was the very exception necessary to make this test safe.

In this case, the MUP had only one crossing throughout the entire speed run, and has a perfect clear sight to anything up ahead with ample opportunities to scrub speed well in advance of any problem. As we see in the video, traffic was 100% clear during the run, and he quickly cut speed during his only interaction with pedestrian traffic. Granted, 12mph might have been a bit hot to ensure the pedestrians were ready for his approach, but knowing the runner was his neighbor may have influenced it too - and, of course, his actual passing speed, as mentioned above, was 7.45mph.

It doesn't take an electric motor to ride 12 or 7.45mph on a bicycle, so if any of you curmudgeons want to blame the approach on the motor in your frenzy to pin the problem on e-bikes, I'll gladly point out the bias in your logic.

Provided any further runs are done within these boundaries, I can't particularly fault it. That looked like a good half mile of MUP with the best sightlines one can ask for short of being dead straight - pretty much impossible to accidentally buzz someone here unless you're actively trying to be a jerk. Speaking of jerks, that dog owner hasn't either trained their animal to behave around others on an MUP - or simply avoided the MUP in accordance with their dog's nature. If your pet can't behave, don't take them on the MUP.

As for fun with overvolting: Nice work, and glad to see the sturdiness of a Raleigh Sports proven yet again. The forks may be a bit weak, but that rear triangle - especially on a pre-TI model with those beefy seatstays - can take some significant torque.

I tried 36V on a 24V 8Fun (Bafang) hub drive motor once. The max speed of 18mph lept up to 29; 31mph if one pushed it. Too fast for a whippy, mono-tubed aluminum frame, but a fun experiment to try once. We don't have enough uninhabited straightaways to warrant such a machine though. That goes for cars too.

-Kurt

P.S.: If anything, someone should be talking about that good - but probably not good enough - cable barrier separating that highway from the MUP.

ColonelSanders

What kit have you fitted to your bike?

spinnanz

The hub is from an EasyMotion EasyGoRace. The controller is a generic 48-72v China job.

ColonelSanders

I was surprised at how quick you were able to go.

How does your bike handle steep hills?

Do you go through brake pads very quickly?

spinnanz

Hills I've found just "OK" as it's only a single gear, which is geared quite highly. On the odd occasion I do a hill ride, I back the amps off, to around 15a. My controller isn't programable so I do this by swapping shunt resistors.

The pads last 3-6 months or so, depending on where I ride. The brakes are now modern dual pivots.

repechage

that's it, no pedals, hub motor.

repechage

wiring and switches derived from the movie Brazil?

jonwvara 

Interesting, if a little scary.

Classtime 

There must be more appropriate places to post the promotion of this idea.

MODS? Please
move this thread to the motorbike forum.

JulesCW 

It appears that you only pedal at lower speeds -- that most of your top speed run is fully motor-driven. This is not what I'd call an e-bicycle -- at best it is an e-moped.

Overclocked e-mopeds might be fun, but they're not, IMHO, e-bicycles and do not belong on MUPs -- I commute every day on a MUP, and there are a couple of commercial e-bikes that the riders have modified into high-speed e-mopeds that frequent that trail -- they are a serious menace, and are, unfortunately, creating a backlash against both bicyclists and sane, responsible people on actual e-bikes.

E-mopeds going 37 mph should be on the street, not on MUPs -- FWIW, I feel the same way about groups of young racers and wanna-be racers who ride at 20+ mph in packs on MUPs. Go find a road -- the MUP is not the place for that. Bah humbug!

The technical achievement shown here is pretty impressive, however. As far as the C&V goes, I'm ok with that -- if you'd done this to a Confente or a 1950s Herse, on the other hand...

sloppy12

that came out pretty sweet.. I have seen a couple vintage bikes done with the geared hub motors and they all look like a blast.

DonkeyShow

Seems safer than the group rides doing weekly world championships. Nice job OP.