BMP kit in rain

Discussion in 'Friction Drive' started by retgi, Oct 17, 2009.

  1. retgi

    retgi Member

    Yesterday while returning from a Publix run about 6 miles from home it started raining pretty darn hard. I have the BMP kit with 1.25 roller and she never skipped a beat, no slipping at all.

  2. andyszyd

    andyszyd Member

    WOW !

    Great news,

    I like that since I am about to order BMP kit, what kind of tires are you using? What kind of bike and engine?
  3. retgi

    retgi Member

    Andy, it's Pete up in Homosassa! Just using an old cruiser w/6-speed I got from a neighbor for $25.00. Painted it up a little, greased bearings, and got new seat and handlebars. Got the Titan and she's sweet with hardly any vibrations compared to the Chinese frame mount I have. The tires are "Bontrager" Cruiser tire 26x 2.125 I bought at a bike shop in Brooksville. They have a nice pattern but not rough and they don't make any noise, at least I can't hear it over the engine. I had some 6 or 7 miles to go in the rain and was expecting it to start slipping from the beginning but after a few minutes I realized these tires with the BMP roller must be a great match.
  4. fetor56

    fetor56 Guest

    How firmly was your roller against the tyre?
  5. retgi

    retgi Member

    The tire is only rated for max of 50 PSI and I keep it around 45 and just push down on it for maybe 1/4". Nothing scientific here, I just exert a little pressure on it and lock it in place.
  6. Happy Valley

    Happy Valley Active Member

    It's possible to nurse FD along in the wet, particularly on flat ground without grades or hills. More attention to spindle down pressure, easy feathering of the throttle, no sudden accelerations and ease up to speed. It takes a different touch than when the surfaces are dry.
    That said, all FDs that utilize a steel spindle will slip on a wet rubber tire for the same reason bikes with steel rims will have poor braking with hand brakes: wet rubber slips on steel.
    I've logged about 3000 miles this year on MBs. I have the BMP FD, several actually, as well as a Staton and DE also. All of them with a steel spindle can and will slip in wet weather. Granted, where we live there is a lot more hills than FL but steel spindles will slip even when it's not raining just in wet leaves this time of year. About the only FD I know that won't slip in the wet is the DE with the stone aggregate rollers but they wear tires quickly once the road surfaces dry out. It's just one of the trade-offs with friction drive.
    Last edited: Oct 18, 2009
  7. retgi

    retgi Member

    Well, you must be the resident expert for friction drives then. It's true and pretty obvious you would nurse it along when wet but then again I've been motorcycling for forty some years and I guess it's second nature to me whenever riding on two wheels in the rain to not make sudden accelerations (which I can barely do anyway on this motorized bicycle) and definitely no sudden stops. You see, I don't want to bust these old bones. Sure, it's pretty obvious that when wet rubber meets wet steel that slippage usually occurs. Maybe my new tire/tread pattern and new steel roller with all protrusions still pretty sharp. Anyway, I stand by my original comments. In fact there were several slight upward grades and one in in particular was about a quarter mile long and not once did she slip in the rain.
  8. Happy Valley

    Happy Valley Active Member

    Well resident expert are your words but I am someone who has put a few thousand miles on various MBs per year for the past few and comment on that combined experience.
    This has been the third wettest summer in about a hundred years here so I've had to adapt. Friction drives have a lot going for them and great for putzing around but I've needed to add a belt drive MB for a dependable, any-day, all-season commuter pretty much regardless of the weather.
    Last edited: Oct 19, 2009
  9. moondog

    moondog Member

    When I was 16 and lived in Ohio I road a motorcycle year round.

    Winter driving was crazy !

    I live in Florida now.

    As for driving in the rain, done that !

    At stop signs it gets slick like ice when it rains in Florida. The oil dripping from the cars builds up at these places.

    I would think that this oil, water mix would also get on a friction drive roller and help cause it to slip during rain.

    I would advise against riding any bicycle in the rain. Motorized or not.
  10. moondog

    moondog Member

    To be clear, I almost got run off the road yesterday by a big truck and it was clear out.

    He was so close. I get passed a lot by people that seem to not be able to see me.

    Riding in the rain with cars passing is a bummer.

    Sometimes when they pass it makes a big spray and all I can see is white for a few seconds.

    Sometimes I get splashed real good.
  11. Happy Valley

    Happy Valley Active Member

    All depends. There are those committed to bicycle transportation, some by circumstance others by choice, who ride all weather.

    My wife logs about 5000 miles a year on a regular bicycle year round in New England.
    She missed two days last winter season when the temps were in the minus 13 degree range.

    My partner in the bike business and good friend rides year round here. He does a 12 mile one way commute, good lighting system, GoreTex clothes and studded snows in the winter. Picks his routes.

    All depends.

    This is a pix of the group that won the current recycling contract for our municipality. Note the stalled car.
  12. moondog

    moondog Member

    That's awesome ! ! ! Florida has spoiled me ! I am not sure I could make it around up there in a car !
  13. Esteban

    Esteban Active Member

    Yep, learning how to apply the throttle " easily " , pedalling some , & a few other tips & I don't have any slipping much at all. " Feathering " ,[ I call it] , your throttle makes your tires last, too.
  14. 5-7HEAVEN

    5-7HEAVEN Guest

    Yes, I feather my throttle and use largest chainring sprocket and smallest rear sprocket to pedal-assist during wet weather.
  15. Will Snow

    Will Snow Member

    No slipping in a rain storm for 6 or 7 miles and on an a grade a that. That is a pretty good test for a friction drive. Do you think it is the tire that made the difference. That was always my problem, If the street was even damp I would go no where. That was years ago using a set up that was called a "Bike Machine", maybe your roller is better. I would not think there would be that much difference in tires, but maybe so. Have you been on any wet streets lately? If so, does it still not slip.

    I have the same drive as yours on order. If you are still doing so well maybe I should buy the same tire you are using unless you have come up with any new ideas as to why you are doing so well on wet streets.

    I thought I could hook up my wifes hair dryer to a big battery with an inverter and dry the tirer before it gets ro the roller. Don't you think that would be a whiz of an idea, but I don't dare try it. My wife would throw me out of the house.
  16. retgi

    retgi Member

    You need to get right over to the patent office with that idea!
  17. Will Snow

    Will Snow Member

  18. cycledude

    cycledude Member

    I'll let you know how mine does soon, I got me the 1.25 roller with the self lock bearing (whatever that means).

    Thing about driving in the rain is, I used to do it until I realized that I was walking around with a straight brown line on my back reaching from about my waist to the top of my head.

    Now I just stop somewhere tho I can never find a place fast enough
    Last edited: Nov 16, 2009
  19. 5-7HEAVEN

    5-7HEAVEN Guest

    With any friction drive, the housing will deflect the puddle water so you won't get that "skunk stripe".:ack2:

    :idea:For those without friction drive, install a rear fender.
  20. eastwoodo4

    eastwoodo4 Member

    or you could hang a monkey off the back with a towel,so he could dry the tire before it goes by the roller.