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Are bolt-less spline drive sprockets the wave of the future? Considering getting one for a "rider" bike of mine. Anyone have any experience with spline drive, bolt-less sprockets?

chillywilly263 · 2012-05-31 8:51am

I've got an S&M L7 spline drive on my 24" Dirt Bike. No problems with it so far.

cancan · 2012-05-31 8:57am

It is the future. Less weight and better engagement!

muphasta · 2012-05-31 9:13am

I'll be putting one on my son's 18" after this weekend. Considering one for my bike too.

cmc · 2012-05-31 9:22am

I put an S&M spline drive sprocket on my new InDust 22" http://bmxmuseum.com/forums/viewtopic.p … 8#p3501338 . . . .

but honestly I'm still a little dubious of the benefits of this 'invention.' It seems like any small imperfections in the machining of the sprocket, or any damage to the spindle itself, could make installation difficult. I guess I'm just used to things stripping out over time... and the traditional bolt-sprocket-to-crank-arm just seems more dependable. ??

but still, no complaints so far.

TheKoolKids · 2012-05-31 9:51am

I think the proper term is no boss cranks / spline drive sprockets
Why not go for it. One less bolt to remember to tighten down.
The sprocket hole looks like the inside of your crank arm, aNd if you never striped out the crank what would make one think you'd strip out the sprocket haha

Oo man good idea,
Ok my profile cranks are ONLY RHD (on my sunday). One big problem I grind on my right.
So, can I take a spline drive sprocket and install it on my left side of the bike..?
Such a good idea. If yes, then, now ever crank CAN be LHD or RHD !!!

oldmanjoe · 2012-05-31 10:14am

I have a couple of these, and I have no issues at all. I'm not sure if they are the future or not, but I see nothing wrong with the design. I can't imagine stripping 48 splines.

I wanted it because I thought it was great engineering. They should fit tight, so taking them on and off isn't great, but I don't do that much.

But because they are 19MM 48 spline, they only work with certain crank sets. So I don't see the traditional way going anywhere soon.

chillywilly263 · 2012-05-31 10:29am

cancan wrote:
It is the future. Less weight and better engagement!

Better engagement?

muphasta · 2012-05-31 11:13am

also less chance of "wobble". No unevenness since there isn't one bolt holding things against the crank arm.

Thrash · 2012-05-31 11:23am

since a threw on a spline drive ive noticed a significant decrease in tight/loose spots

cancan · 2012-05-31 11:40am

Thrash wrote:
since a threw on a spline drive ive noticed a significant decrease in tight/loose spots

this is what I meant by better engagement. you don't have a bolt that is too small for the hole sliding and deforming the sprocket.

it probably puts less torque on the drive arm too. I see some cranks rip apart from the welds of the spline boss to the welds of the drive boss

waterslider · 2012-05-31 12:51pm

good topic. I have wanted a pair of the new ELF cranks for a while now. Then i found out they no longer made boss cranks only spline drive.
I always thought the SD cranks would give a better chain alligment.

powersbikeshop · 2012-05-31 1:07pm

There awesome! and deff the future of bmx! give me a call if you have any more questinos!

Roy Munson · 2012-05-31 2:27pm

chillywilly263 wrote:
cancan wrote:
It is the future. Less weight and better engagement!
Better engagement?

I was gonna say the same thing. Haha

adamdawson · 2012-05-31 2:45pm

deffo an improvement in design. the crank arms stay on the same way so why not do the sprocket the same. another one of those things that should have been done long ago.
the pluses of lighter weight and its easier to get an exact chain alignment/crank arm clearance on some of those tricky frames.

i still dont run one yet, but thats only because im running a mds bashguard sprocket and they dont have spline drive.
my buddies that run em have had no problems, and by design i dont think anybody will.

cmc · 2012-05-31 2:50pm

i don't know what to call it.... but the black insert that is in the center, i assume that is some other stronger material than the aluminum sprocket. maybe chromoly?

http://bmx.transworld.net/1000078649/ne … rank-arms/

TheKoolKids · 2012-05-31 3:09pm

Roy Munson wrote:
chillywilly263 wrote:
cancan wrote:
It is the future. Less weight and better engagement!
Better engagement?
I was gonna say the same thing. Haha

You think I could use spline drive sprocket on my Sunday's profiles that are only RHD and use a spline drive to make it LHD..?

LIVE TO RIDE · 2012-05-31 3:16pm

With a spline drive you can run LHD or RHD it makes no difference at all.Usually your sprocket bolt is on the right side crank arm making it a RHD only but since your locked onto the spline instead of the boss itll run both ways.Im running splined on my Tribute and Im about to switch to LHD.

TheKoolKids · 2012-05-31 3:18pm

LIVE TO RIDE wrote:
With a spline drive you can run LHD or RHD it makes no difference at all.Usually your sprocket bolt is on the right side crank arm making it a RHD only but since your locked onto the spline instead of the boss itll run both ways.Im running splined on my Tribute and Im about to switch to LHD.

Sweet, so I can!
You dont have to run boss less cranks to run spline drive

spyker · 2012-05-31 3:30pm

cmc wrote:
i don't know what to call it.... but the black insert that is in the center, i assume that is some other stronger material than the aluminum sprocket. maybe chromoly?

http://bmx.transworld.net/files/2009/03/19/tree.gif

http://bmx.transworld.net/1000078649/ne … rank-arms/

The black insert is the same material that's used to make the 48 spline spindles.

For anyone thinking about using splinedrive sprockets,do not use them if you plan on or currently running a Ti spindle.

apocalypse dude · 2012-05-31 4:20pm

why not?^

G. · 2012-05-31 4:30pm

I just did a order w Profile today and talked to my friend there re getting some of the new splined Elite sprockets for my race bikes and he assured me I'd be fine on them (He knows I weigh 260 and usually abuse stuff)

Flatlandfox · 2012-05-31 4:34pm

NICE & CLEAN, & NO ISSUES with TI Spindle, & Spline Drive. I've been running this set-up for about a year now...

Last edited by Flatlandfox (2012-05-31 4:37pm)

spyker · 2012-05-31 5:05pm

apocalypse dude wrote:
why not?^

Two different types of material,one is harder than the other,when they come into contact under load,the softer one will wear out faster than the harder material piece.

There is a reason why the spline insert is the same hardness of the spindle,ever wonder why automotive drivetrain pieces are all the same rockwell hardness.

spyker · 2012-05-31 5:08pm

Flatlandfox wrote:
NICE & CLEAN, & NO ISSUES with TI Spindle, & Spline Drive. I've been running this set-up for about a year now...http://i853.photobucket.com/albums/ab99 … G_0012.jpg

This bike looks like it has barely been ridden and the only time it is,it's ridden lightly for photo shoots.

So I understand why you don't have any issues with the Ti spindle splinedrive set up.

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Spline Drive

Spline Drive

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cancan wrote:

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Thrash wrote:

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chillywilly263 wrote:

cancan wrote:

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Roy Munson wrote:

chillywilly263 wrote:

cancan wrote:

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LIVE TO RIDE wrote:

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cmc wrote:

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apocalypse dude wrote:

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Flatlandfox wrote:

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