Ball VS roller bearing steering bearings - Ducati.ms - The Ultimate Ducati Forum
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post #1 of 66 (permalink) Old Jan 8th, 2017, 4:08 pm Thread Starter
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Ball VS roller bearing steering bearings

I just replaced the tapered roller steering stem bearings in my 96 900 M... I came to my attention that Ducati used roller steering bearings for many years and then some or all models switched over to caged ball bearings in the late 1990s?
Did all models change over ? Or just some? Did Ducati ever state why they went from roller to balls or ...what is the history on all this ?
It also seems some other manufacturers have switched from rollers to ball bearing in recent years...

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post #2 of 66 (permalink) Old Jan 8th, 2017, 5:28 pm
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Prob due to cost, every penny counts!

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post #3 of 66 (permalink) Old Jan 8th, 2017, 5:49 pm
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Tapered rollers are the way to go. If UR digging around in the to "check the grease", you'd be wisest to switch to tapered rollers.

My guess, also, is the ball bearings are cheaper.

I upgraded my ST2 years ago to tapered rollers, and I could almost not believe the difference.

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post #4 of 66 (permalink) Old Jan 8th, 2017, 6:37 pm
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Rollers are better. If you're replacing yours go that route. . Balls can Brinnell the cup from impacts and get notchy. Rollers have way more contact area which helps prevent this.
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post #5 of 66 (permalink) Old Jan 9th, 2017, 5:33 am Thread Starter
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Originally Posted by duc96cr View Post
Rollers are better. If you're replacing yours go that route. . Balls can Brinnell the cup from impacts and get notchy. Rollers have way more contact area which helps prevent this.
So why do some Ducatis have rollers and some have ball bearings? And it seems the lower end bikes have the rollers...

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post #6 of 66 (permalink) Old Jan 9th, 2017, 12:15 pm
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You'll have to ask Ducati. My guess is money. My old SS has rollers. Why are all the bearing kits converting from balls to rollers ? Maybe because as long as you're doing it, might as well do it the best way ?

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post #7 of 66 (permalink) Old Jan 9th, 2017, 1:01 pm
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I doubt that the factory Yamaha Motogp team use ball bearings because they are cheaper.

Ball VS roller bearing steering bearings-imageuploadedbymotorcycle1483988478.259713.jpg

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post #8 of 66 (permalink) Old Jan 9th, 2017, 2:39 pm
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yup, i was going to post that picture too...as well as a short blurb from Stanboli: Attack Performance GP Triple Clamps - Page 5 - Triumph675.Net Forums

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post #9 of 66 (permalink) Old Jan 9th, 2017, 3:43 pm Thread Starter
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I doubt that the factory Yamaha Motogp team use ball bearings because they are cheaper.
So for ultimate performance the ball bearings are better as far as steering feel is concerned...

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post #10 of 66 (permalink) Old Jan 9th, 2017, 4:01 pm
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Apparently at the Motogp level it is.

I doubt us mortals would know the difference.

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