Hi Jacoo,
If you rotate the wheel axle, does the planetary gear rotate smoothly? There are 2 things that may be happening:
1) After first putting the item up for sale, Shapeways contacted me as they didn't like the fillets on the planetary gear nor the "M" inscription on it, so I adjusted...
I think the nylon is going to be pretty tough, but mostly because of it's location. It's very protected by both the frame and the sensor and rotor. Then again I don't ride through bushes much, so if someone is doing some sort of epic ride on an overgrown trail, that could be different. I think...
Thanks for the pictures Jacoo. I'm not that good with French, but if I'm understanding you correctly, I think you are saying there was no problem mounting it to the bike. That's great news as that was one of my main concerns (i.e., the tolerances on the parts printed by Shapeways).
I'm open to all possibilities, however, I'm not aware of any 3d printing places that offer a volume discount (it's not like injection molding where there are upfront costs). I've also never gotten anything printed in Aluminum, but I have in stainless steel and the quality is a bit rough (I...
You are the first I've heard to receive one, so congratulations! I'm glad the prints turned out good. Do please let us know about how well it fits and if there are any issues. I'm sure we would all love pictures as well :)
I would love to print in Titanium. Sadly over the past 5 years the cost hasn't gone down at all. It's still ridiculously expensive. Shapeways doesn't have Titanium but i.Materialise.com does, so just for kicks I uploaded the model to see how much it would be. Grand total? $747.34 :eek:
Titanium...
The best way I can think of to measure is to cut out a cylinder (maybe out of cardboard) that is 60mm in diameter and 8.5mm thick. That would represent the dimensions of the LSS. If you put a 22.3mm inner hole in it too then you can mount it on your wheel and then mount the wheel on the bike and...
Nylon gears are used extensively in industry and in consumer parts, so I think it should be fine. I did a quick google search on the volumetric expansion of nylon due to moisture exposure and found a value of 0.5-0.6% which I think should be ok.
Part VI
Beta version now available! I did some additional modifications to make it work properly with Shapeway's SLS (Selective Laser Sintering) 3d printing technology, but it still is untested so I only recommend people buy this if they meet the following criteria:
1) Must have a 2019 Levo /...
Speed increase will be around 50%:
For 20 mph bikes this will go to -> ~30 mph
For 25 kph bikes this would go to -> ~37.5 kph
Beta units hopefully for sale in a few days via a 3d printing service. More details to follow
Part V
Over the holidays I made a few tweaks (mostly just tolerances) and adjusted the size of the dust cover, since I think that was bothering a lot of people :) So far it has been performing great. Within the next few days I'm going to put this on Shapeways so the adventurous on here can get...
Thanks everyone for your replies. My wife ended up shutting us to the top with a car, which was awesome, so I didn't try towing. Still might try it some day...
Yes, that is a free alternative, but with the internally routed cabling it makes this method not easily reversible for when you need to take it into the shop. Plus, if Specialized wanted to they could probably update the firmware to detect this method (i.e., the signal frequency coming from a...
I agree, that would be awesome. However, I think the cost to design/produce it would be very high. Even if off the shelf electronics could be used (I'm guessing a custom PCB would be needed) you'd still have to deal with the coding as well as all assembling, i.e., the soldering of the wires /...
Hi All,
I will be riding with a friend who has a 43lb downhill bike and he wants to shuttle the trail with his truck. There is a road that goes to the top of the trail. I'm wondering if I could bring a bungie cord and instead use the Levo to tow him up the fire road in between runs.
I weigh...
Hi Njn,
To clarify, the printed parts do not touch the rotor bolts in any way. It would not be safe to torque the bolts onto plastic, as you would not be able to achieve proper torque. That is why I designed the retaining ring that clips directly on the rotor to hold the ring gear in place (see...
First failure! On a ride today I started hearing strange sounds coming from the rear wheel. I stopped at a park and inspected and the dust cover was completely chewed up. See all that gunk on it? That's my frame's clear coat and paint (thankfully it's on the inside which you can't see anyway)...
Yeah, that is a bit of an unknown as well. Using Nylon should significantly increase the temperature range it can handle. Next time you heat up your rotors can you feel the center of them and let me know how hot they feel?