I know people have done it the other way around, but I really don't want to have to change my wheel set just yet. Does anyone know if bearings are available to adapt this?
Justin
I can't help....
I'm just waiting for someone to tell you your axle is 20mm not 17. ;D
Quote from: ducpainter on May 06, 2009, 09:56:52 AM
I can't help....
I'm just waiting for someone to tell you your axle is 20mm not 17. ;D
Ah crap, you got me Nate... it's the rear that's 17 right?
Quote from: A.duc.H.duc. on May 06, 2009, 10:15:47 AM
Ah crap, you got me Nate... it's the rear that's 17 right?
No...No ...No...
My 96 actually has a 17mm front axle.
There weren't many bikes built that way.
It's entirely possible on the early bikes.
Pretty sure the rears were 20 mm.
Aww see, you made me second guess myself.
I have a '97 and it has a 17mm front axel.
Do you know the OD and thickness of the 17mm bearing?
If the OD of the axle bearing will allow I can`t see why not, but this a Ducati afterall so it might be a huge problem that only lots of dollars can fix ;) ;D
I'll get some measurements on the current bearings.
You need some 361203R SKF bearings
Quote from: supertjeduc on May 08, 2009, 11:51:53 AM
You need some 361203R SKF bearings
You sound pretty sure about that, are you 100% sure on that?
I looked that bearing up online, and it has a 17mm inside diameter.
Quote from: A.duc.H.duc. on May 08, 2009, 01:01:53 PM
You sound pretty sure about that, are you 100% sure on that?
I looked that bearing up online, and it has a 17mm inside diameter.
You are wright this bearings are for 17mm axel in a 25mm frontwheel [bang] [bang] [bang]
So no one's ever tried this?
I'll get some OD bearing dimensions when I take the front end apart next weekend.
Justin
Quote from: A.duc.H.duc. on May 10, 2009, 07:05:07 AM
So no one's ever tried this?
I'll get some OD bearing dimensions when I take the front end apart next weekend.
Justin
You may want a thickness too.
IIRC the available bearings for the 20 mm axle to 25 swap made the bearing journal too shallow and required machining.
As an alternative why not make bushings for the axle you have?
I did this for the rear wheel. They don't make a bearing the right width, so I had to have a machine shop make me a spacer for each side of the wheel so the bearings would sit flush.
Quote from: ducpainter on May 10, 2009, 07:11:13 AM
You may want a thickness too.
IIRC the available bearings for the 20 mm axle to 25 swap made the bearing journal too shallow and required machining.
As an alternative why not make bushings for the axle you have?
My current front axel is 17mm, as is my wheel, and its bearings. I want to swap forks to a set with a 25mm front axel. I could get new rims, but to be honest, I just haven't found a set I like.
Or did you mean bushings to space the axel out to the forks?
Quote from: A.duc.H.duc. on May 10, 2009, 09:57:42 PM
Or did you mean bushings to space the axel out to the forks?
Yup
Quote from: ducpainter on May 11, 2009, 03:31:40 AM
Yup
Well that's an interesting idea. Not sure if I'd trust the pinch bolts to hold the axel with a bushing that big, but maybe.
Quote from: A.duc.H.duc. on May 11, 2009, 05:13:39 AM
Well that's an interesting idea. Not sure if I'd trust the pinch bolts to hold the axel with a bushing that big, but maybe.
The bushing isn't going to end up
that big.
Slot the bushings. The pinch bolts will work fine.
Quote from: ducpainter on May 11, 2009, 05:17:40 AM
The bushing isn't going to end up that big.
Slot the bushings. The pinch bolts will work fine.
Well I assumed the slotting was implied. You're right, it wouldn't be that big. It seems like a practical, though not elegant, solution.
Quote from: A.duc.H.duc. on May 11, 2009, 03:11:31 PM
Well I assumed the slotting was implied. You're right, it wouldn't be that big. It seems like a practical, though not elegant, solution.
Elegance is a luxury I can't afford.
I'm more of a pragmatist.
Make it work bro. ;)
Quote from: ducpainter on May 11, 2009, 04:02:09 PM
Elegance is a luxury I can't afford.
I'm more of a pragmatist.
Make it work bro. ;)
That's pretty interesting considering your profession. ;)
Quote from: A.duc.H.duc. on May 11, 2009, 05:04:34 PM
That's pretty interesting considering your profession. ;)
This isn't my customers stuff we're talking about. ;)
My Monster tank is all bashed in and my 996 looks like it graduated clown college..
You don't have the cake to buy wheels.
My idea works. ;D
Quote from: A.duc.H.duc. on May 10, 2009, 09:57:42 PM
My current front axel is 17mm, as is my wheel, and its bearings. I want to swap forks to a set with a 25mm front axel. I could get new rims, but to be honest, I just haven't found a set I like.
Or did you mean bushings to space the axel out to the forks?
Try these guys:
http://www.accuratebearing.com/quote.php (http://www.accuratebearing.com/quote.php)
I've been working too many 18 hours days lately to wrap my head around your issue. Like most, I'm going the other way. The critical issue will be finding a bearing with the proper width, so that the tension on the axle when torqued doesn't jam up the bearings. When you get your front end apart, drop me a pm, I may have the bearings you need that I purchased by mistake when I was working on getting my 25mm wire wheels on my 20mm axle. I ended up going with some SBK forks now that I've found some cheap 65mm calipers and a spare top triple to machine to 53mm. (Thanks Gil, and Mandy)
Also, did you sort your top triple situation? I'm selling the cycle cat 53 mm top clamp I bought for this swap because I don't want to use clip-ons.
Quote from: dlearl476 on May 12, 2009, 07:15:53 AM
Also, did you sort your top triple situation? I'm selling the cycle cat 53 mm top clamp I bought for this swap because I don't want to use clip-ons.
I've got a Cycle Cat 53mm top clamp...
I'm with DP on this one.
One bushing, internally threaded to match the axle, 25mm OD.
So it would be the same general arrangement as what you've got now, just bigger OD.
Or a split bushing, and re-use the OEM threaded bushing.
A split bushing for the other end.
Mock-assemble it before you get parts made, to make sure you've got the wheel centered in the forks.
Quote from: Speeddog on May 12, 2009, 09:06:21 AM
I'm with DP on this one.
One bushing, internally threaded to match the axle, 25mm OD.
So it would be the same general arrangement as what you've got now, just bigger OD.
Or a split bushing, and re-use the OEM threaded bushing.
A split bushing for the other end.
Mock-assemble it before you get parts made, to make sure you've got the wheel centered in the forks.
One thing that throws a wrench into the works, so to speak, is that the diameter of the axle isn't the only variable. The hubs of 20mm and 25 mm wheels are different widths, and that difference is dealt with by different speedo drives and a different step on the axle itself.
Like I posted earlier, I'm friggin' exhausted, but I can't help but think some of the issues I dealt with attempting my 20mm>25mm swap would pertain to a 25mm>20mm swap as well. The trick is to have just the right width so when the axle is torqued you get just the right loading on the bearing. Too much and the wheel won't turn, to little and it will wobble. Another variable is that a 20mm axle is torqued to 90 Nm and a 25mm one something like 15Nm. (I can't remember the exact numbers, the the difference is significant)
anyone have a silver 25mm axel front wheel then? With the appropriate speedo drive?
I'd just buy that if it solved my problems.
...with rotors would be nice.