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  1. m@Robertson

    Mounting a BBSHD in an Ultra frame?

    Exactly. Key words are 'appropriately tuned'. On another forum I just read an experienced bicycle mechanic who has worked on and tuned many BBSHDs (or at least thats what they claim on the internet) and this person was pooh-pooh'ing the motors because she couldn't get rid of the overrun and...
  2. m@Robertson

    Old man, new bike, massive hills, lesson learned

    If you live in an area where you would need one, then owning it is not frivolous. In your case, it seems your bike can't make it around your own local area. That is cause to consider whether you bought the right bike. I see the Crosscore RC only has a 250w nominal, 500w peak motor that puts...
  3. m@Robertson

    Yamaha battery seems difficult to source and is a tad expensive....

    Alternate your use of the batteries. That will solve the long term storage issue. High battery cost and limited availability is normal and part of the cost you pay when you buy a big name brand like this. Wow that sure does look like a product line that is in the process of being put out to...
  4. m@Robertson

    Mounting a BBSHD in an Ultra frame?

    What @Chargeride said. Its been done successfully. You need machine shop skills and of course a machine shop.
  5. m@Robertson

    Tire reccomendation

    I stole this from the Maxxis site. Said better, faster than I could: Something like a 120 tpi tire would be ideal for a road bike. 700x20c tires and 100 psi for instance. I lived for those things back in the day. Literally. Take a hard corner on a 100 psi tire and you really want it to be...
  6. m@Robertson

    Tire reccomendation

    No. :) there is no relation to the bead vs. flat protection. Same here but remember that bicycle weight is critical if you are the only motor. I spent decades on a road bike that weighed less than 20 lbs and every ounce saved mattered. Exactly for that reason. Kenda tires are good enough...
  7. m@Robertson

    Tire reccomendation

    The GLK250 had the turbocharged 4 cylinder Benz diesel that they use in their meat-and-potatoes delivery vans. LOADS of torque, 45 mpg pon the highway and easily good for 300,000 miles. Except in California where the diesel particulate filter is a $7000 replacement (6k for the filter and 1k...
  8. m@Robertson

    cargo ebike for heavier riders

    Again on the Roll Road and BS performance claims: This pictured bike has two motors comparable to the Emma (Bafang Bigfoot 750's that are extra heavy duty internally and sadly no longer made). One on each axle. The front motor is going to be ballast only on a 30% grade. But each motor has...
  9. m@Robertson

    cargo ebike for heavier riders

    I don't think people understand what a 30% grade actually is, and just how near-impossible it is for an ebike to make it up something like that. Especially not a hub motor bike of any stripe, but even a mid drive on its lowest gear can be a bit of a 'maybe'. And lets be real on the Emma...
  10. m@Robertson

    20” x 3” E-bike tires

    If you are going to go down a little in size, the Kenda Slant Six in 20x2.6 is a little smaller with smaller and fewer knobs. Its what I am using now. Solid grip. If I were to guess, its not going to last too long. Maybe 6 months although I ride a lot. A Schwalbe Pickup in 20x2.6 is going...
  11. m@Robertson

    20” x 3” E-bike tires

    I use these in a cargo application and they are heavy-duty, with a super strong casing (30 tpi) but fast-rolling. They are very good on everything and the best at nothing. Think of them as an XC capable tire so good for doubletrack dirt and gravel roads, or flat pavement. Wet or dry. The...
  12. m@Robertson

    Tire reccomendation

    I had a Mercedes GLK 250 diesel that I did the same thing with. The taller truck tires, not the crevasse :) I loved that little truck. tons of torque, plus it was right in its power band at highways speeds so I could floor it and blow the doors off of anyone who was pissing me off. With the...
  13. m@Robertson

    Tire reccomendation

    Yeah with my last couple of cars I am in the same boat.
  14. m@Robertson

    Tire reccomendation

    Yup. Part of the cost of a new set of tires is a 4-wheel alignment right after the tire install. When I check tire pressure, I do it first thing in the morning, at the coldest part of the day and before the sun crests over the house. So my tires have had all evening and night to equalize...
  15. m@Robertson

    Tire reccomendation

    Kenda. Kendra is a girl who makes naughty movies. Interesting. 47-559 is commonly used as the ETRTO for 26x1.75... not 1.7. Remember what I said about the loosey-goosey nature of Imperialist tire measurements? here it is again. All that matters there is 40-65 psi. Keep it closer to 65...
  16. m@Robertson

    Tire reccomendation

    Yes thats right. The common phrase I have heard for a tire that is on a too-narrow rim is a 'light bulb' profile. Oh my yes. I decided to try and push that envelope a bit once - and I knew better but tried it anyway - and had exactly that happen. I had a 700c wheel and I tried to go a little...
  17. m@Robertson

    Tire reccomendation

    oh and also remember that as a tire's width increases, so does its outer diameter. A 20x2.3 tire's outer diameter vs. a 20x3.0 can be enough that the tire no longer fits under the fork., So don't just keep an eye on the fork width. This pic is me learning this the hard way so you don't have...
  18. m@Robertson

    Tire reccomendation

    Well you have opened up sort of a can of worms here. the answer is No and Maybe all at the same time, with an occasional Yes sprinkled in that you can't count on. First, the closest you will be able to get is commonly referred to as the casing width. How fat the tire gets but that doesn't...
  19. m@Robertson

    Tire reccomendation

    ^^^ Exactly this! The whole 'crotched rim' thing is a bit overblown. You can expect almost (!) every rim to have at least some form of depression in the center to allow the bead to be moved to the middle and allow you to get the tire on/off as a result. And its not just wire beads that are...
  20. m@Robertson

    People for Bikes: Progress on Ebike Laws in the US

    That sums up ebike regulatory practice completely and succinctly.
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