Electra Lux Fat with BBSHD

[g725s]

In first gear, 1/4 inch of airspace between chain and rear tire.

So there is no way you could use an Eclipse with the Electra Lux Fat 7D, even with spacers. I mean I guess you could, but how many spacers can you install safely? Maybe you could use a Lekkie, especially with a spacer.

Not included in the below pic is the Bafang Alloy(9mm inset) and Luna Spacer (3mm thick):


And not mentioned in the above pic is the California Ebike chainring adapter (around 10mm inset) which is about 1mm more inset than the Bafang Alloy. Also California Ebike shows that they have 1.27mm spacers that are half the thickness of the Luna Spacer(3mm thick)... http://california-ebike.com/product-...ings-adapters/

[g725s]

Made a mistake here. You cannot use the Lekkie with the Electra Lux Fat 7D as that would put the chainline too far off. So really with the stock 100mm Bottom Bracket of this frame you can only use the stock chainring and possibly the Eclipse(depending on how many spacers can be used)

[g725s]

Correction again, since they have since updated a mistake in the above video. They have since remeasured the Lekkie to be 20.4mm using their odd way of measurement.

Using an odd measuring method trying to put calipers inside the chainring opening and measuring the thickness of the faceplate, then laying the chainring on a table and measuring from the table to the top of the chainring, and then subtracting the thickness of the faceplate.....Really guys?

http://electricbike.com/forum/forum/knowledge-base/motors-and-kits/bbshd/20359-bbshd-chainwheel-offset

Using their method they get 9mm for the Bafang Aluminium, but here in this tread below here is a better way to measure and you get a more accurate measurement

http://electricbike.com/forum/forum/builds/ebike-building-directions/9435-electra-lux-fat-with-bbshd?p=20630#post20630

[calfee20]

Luna has these now as well. http://lunacycle.com/luna-bbshd-130b...nring-adapter/

[g725s]

Luna has these now as well. http://lunacycle.com/luna-bbshd-130b...nring-adapter/

Luna should list the offset of this and all other chainrings.

[g725s]

Had some time to take a few measurements today putting a 68mm BBSHD into the stock standard 100mm Bottom Bracket.

In this picture below is a measurement of the stock crankset chainring to the frame. It is 1 3/16" from the frame. On my Lux Fat bike that puts the chain 1/8" from the tire in the lowest gear, which is where I want it to be at end my build, as I will be using the lowest gear often and therefor want the best possible chainline.






Be aware this following picture of the distance of the Luna Eclipse to the frame is taken without the BBSHD cranked down tight in the Bottom Bracket (it's a 68mm BBSHD slid into a 100mm BB). But the distace is roughly 1" to the frame, so I'm going to assume once the BBSHD could be cranked down tight it would be a bit less:






Using the stock 100mm Bottom Bracket, if you wanted to use an Eclipse with the Lux Fat bike you would have to use approximately 3/16" of spacers either on the BBSHD itself or on the Eclipse.

Can you install 3/16" of spacers with an Eclipse? If you put 3/16" of spacers on a 100mm BBSHD could you still install the locking nut?

If I cut down my 100mm BB to 71-72mm and used the 68mm BBSHD that I own, what chainrings can I use then?

[g725s]

Here is a picture of the distance of the chain with the stock crankset to the tire, it is 1/8" or a hair less:

[g725s]

When I bought this bicycle, I accepted that the BBSHD might not fit rotated up into the triangle, and I might be forced to buy a completely different bike, or...I might have to make significant modifications to this frame.

I did grind some of the housing fins off of the BBSHD in order to get it fit where I wanted, and I also cut a chunk out of my seat-tube. I don't recommend this to anyone, and another poster here (calfee20) used a pipe and clamps to put a dimple in the frame tubes. That would be a more desirable solution.
http://electricbike.com/forum/forum/...=7342#post7342

Spinningmagnets,

I have to ask how much do you think cutting the seat tube and grinding off some of the motor housing moved the motor back? I'm gunna guess an inch, maybe inch and a quarter? Was this purely for aesthetic reasons?

I've yet to grind off the chain cover mounting tab that is welded onto the bottom bracket so that I can try sliding it in with the motor inside the triangle, but it looks like the BBSHD will slide into the upper triangle without a problem once I grind that off.

[spinningmagnets]

As shown, the motor is a snug fit. I have been given the impression that on the regular Lux (not the fat tire version) you don't have to cut out a slice from the seat-tube, but I haven't verified that. Another Lux fat owner used a pipe and some clamps to compress a depression, instead of cutting anything, which I would prefer recommending.

Cut the chain-guard mount, and see how it goes. It would be easy to epoxy-on another one should you decide to go back.

[calfee20]

If you look at the Electra frame measurements that I posted you will see that the fat frame is larger everywhere except the top tube. I think making the top tube shorter gives you less room around the bottom bracket.

http://electricbike.com/forum/forum/main-forum/general-discussions/19764-electra-cruiser-frame-measurements

[spinningmagnets]

Thanks, Calfee20! I appreciate the info...

[g725s]

Yes I believe you both are right. Looking at it again, I think that modification will be needed so that the BBSHD will fit inside the triangle. Calfee20, where did you get that clamping tool? I'm thinking maybe compress both the seat tube and down tube a little it each. Not sure about grinding the motor housing.

[calfee20]

I used two H-beam puller bodies with threaded rods. The round piece that was in contact with the tube is an old bearing race wrapped in electrical tape. When you do a lot of press work in a shop you need various "bushings" to protect the new parts that you are squeezing together. So I have a large collection of bearing races. Here is a photo of a puller set that is similar to what I have. There is an arrow pointing to the H-beam.


I would drill angle iron and make my own if I didn't have the tools. You don't want to know what that board costs. Quarter inch angle iron and 3/8 threaded rod should do. Just keep your holes close to the bend or angle...........leave room for the nuts.

[calfee20]

I wasn't fired up to remove a pedal and a sprocket but I want to really thank you because both of my pedal arms were loose. Not that you would notice while riding but the arm bolts were just past finger tight. Just to be a smart a$$ I used a dial indicator to measure the offset.



So I got 8.57 mm = .337402 but you can round that to .337

I literally just got paid for an old tractor that someone is going to use as a lawn ornament. I just happened to ask about the price of an Electra Fat. I will be putting money down on one next week and I should have it by Christmas.

[g725s]

Now that's the way to measure the inset of a chainring using a dial indicator, good job. Thanks for doing that it helps me to know if I am making the correct decision cutting the BB of a brand new $650 bike.

[calfee20]

Well I put a hundred dollars down on a Lux Fat. Just for your information the dealer cost is $389 and I am getting it for $599 which is 50 or 60 dollars less than most shops. When I talked to Electra last week they said none were available until December. He then dropped a bomb and said "yeah we have 10 coming". So I am thinking ten for the whole country...........well I have mine ordered.

[g725s]

Interesting to know the 389 dealer cost. And like you i paid 599. I was told that was the lowest they can go. I checked with a few locations and 599 was the lowest for all of them. 650 with tax here in California.

I just purchased the Bafang Aluminium Chainring Adapter ( http://lunacycle.com/parts/bafang-pa...-42t-sprocket/ ) like yours. Got if for a good deal here in the Bike Parts forum

I'm planning on cutting the bottom bracket down to 71mm and using the Bafang Alloy. I think the look fits the Lux Fat style.

Initially I'm going to mount the BBSHD underneath, and wait to see how you most likely will mount it inside the triangle. And I don't have the tools for that right now. Maybe I'll rent yours after you modify your bike ;-)

I ordered a tool for doing rivet nuts, so I can mount my Shark Pack to the slightly curved down tube, at least that is the plan for now anyway.

The Bafang should land in my mailbox early this coming week, and after I test fit it, I will cut the BB down.

[g725s]

Been looking for other tire options that are 26" x 3.5" like the stock tire, which will not affect the chainline in lowest gear. And this is the only one I've come up with so far that I think looks like it would match the stock tire in width and fit the stock rim...

http://veetireco.com/listings/fat-speedster/

Anyone know of other 26" x 3.5" tires?

[calfee20]

Why not use the factory ones. I realize they don't look awe inspiring but if you are going to keep them the same size I don't think you will gain much. Schwalbe has changed their web site and they have a ton of info on tires in general. I haven't read it all yet but I am going to have to. I knew that on good roads slicks were better but I didn't know you would have to go over 200 KPH to hydroplane.



Click on Technology and a whole list of useful information comes up.

[calfee20]

Been looking for other tire options that are 26" x 3.5" like the stock tire, which will not affect the chainline in lowest gear. And this is the only one I've come up with so far that I think looks like it would match the stock tire in width and fit the stock rim...

http://veetireco.com/listings/fat-speedster/

Anyone know of other 26" x 3.5" tires?

Here is what looks like the same tire for $50. I have ordered from this company. I got my rim, spokes, and nipples from them. Very good service. http://www.niagaracycle.com/categori...3-5-bk-bk-fold

[calfee20]

I found fenders if Luna is not going to stock Sondor fenders anymore. http://stores.bigomfg.com/

[calfee20]

It has occurred to me that we have High jacked spinningmagnets thread..........I hope he doesn't mind.

[g725s]

Hey, it's his fault. He started it! ;-)

[g725s]

Good find also. I would like fenders. But the price of $135 is just too overpriced for me. I'm not going to pay that much for fenders.

[spinningmagnets]

Ha ha! No sweat, it's all good.