REVERE THE STEER - Rubicat Going Wide with 72.5" Dynatrac XD60 / PRO 1550 Front Axle

Can you explain how they make the turn radius small with that wide of an axle? I know when I briefly ran 2.75 backspacing (wheels with spacers) my turning radius felt massive.

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While my XD60 front axle has the older Pro 60 carried over from the ProRock 60, it is a bad ass axle. Beefy has hell with those massive axle tubes. It's great having the confidence
To use the skinny pedal when needed with no worries about breaking anything.


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chitown35 said:
Can you explain how they make the turn radius small with that wide of an axle? I know when I briefly ran 2.75 backspacing (wheels with spacers) my turning radius felt massive.
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There's a lot more to turning radius than steering angle and wheel back spacing. What really makes a difference is reducing or eliminating scrub radius. To do this, the steering axis inclination needs to meet as close as possible to the center line of the wheel and where the rubber meets the road. This allows your wheels to pivot instead of scrub and that improves your steering considerably.
 
A very informative, interesting and awesome post (and upgrade!). Congrats on the new axle with awesome innovations! Can't wait to see some shots of it out on the trails.
 
highoctane said:
While my XD60 front axle has the older Pro 60 carried over from the ProRock 60, it is a bad ass axle. Beefy has hell with those massive axle tubes. It's great having the confidence
To use the skinny pedal when needed with no worries about breaking anything.
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There's absolutely nothing wrong with the Pro 60. We've been running it for over 8 years and well over 100,000 miles on Moby - the exact same setup and without any changes to it. Still doing it's job great. The Pro 1550 is just a new and more advanced version of it. :yup:
 
wayoflife said:
There's a lot more to turning radius than steering angle and wheel back spacing. What really makes a difference is reducing or eliminating scrub radius. To do this, the steering axis inclination needs to meet as close as possible to the center line of the wheel and where the rubber meets the road. This allows your wheels to pivot instead of scrub and that improves your steering considerably.
Click to expand...
Lol I am going to need to find a good video tomorrow. It's past my thinking hours.
 
Do the Pro 1550 knuckle come standard on all XD60s? Like the ones that come in the "elite pro rock" axle combo (60/80) ?
 
Excellent write-up. I really appreciate all the photos with explanations.
Love the way the 5.5 backspace wheels cover/protect the ball joints and calipers.:thumb:
 
Benito said:
Do the Pro 1550 knuckle come standard on all XD60s? Like the ones that come in the "elite pro rock" axle combo (60/80) ?
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No, the Pro 1550 does not come standard on a XD60 but if I recall, it is included if you get the Elite ProRock XD60/80 axle combo.
 
benatc1 said:
So bad ass, those knuckles are massive, one day when a double throw down is in play, this will be on the list! Rubicat is ready for 40s!!
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The Pro 1550 knuckles really are crazy big and surprisingly light! As far as Rubicat goes, she's definitely ready for 40's now :yup:

BeechAV8R said:
Excellent write-up. I really appreciate all the photos with explanations.
Love the way the 5.5 backspace wheels cover/protect the ball joints and calipers.:thumb:
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Thank you, I'm glad my post was helpful to you. The 5.5" of back spacing not only cover up/protect the ball joints and calipers, they pull the center line of the wheel in and help reduce stress on the ball joints and wheel bearings as well. Also, by pulling the center line in toward the steering axis inclination, there is virtually no scrubbing of the wheels and so steering is vastly improved even with your lockers on.

linehand08 said:
I have about two weeks left till I get my xd 60 front and 80 rear at 68.5.... Dtd front and rear. With 3.5 back spaced trail readys I've been mounting
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Awesome, congrats to you :thumb:
 
The other great thing about those PRO 1550s is being able to run the 1550/SPL70 u-joint. It's hard to tell looking at the pictures just how massive they are compared to a standard 60 u joint. Very nice upgrade!


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Great! Just GREAT! I've finally got my wife talked into how much better our Jeep will be with 37s, but we'll need to spend the $6,500 for the PR44 front axle and rear shafts, to do it right. Now, after reading this, all I want is 40s and a 72.5" axle with 1550 knuckles. Not sure how much this setup​ costs, but I'm sure it's double what my "approved" budget is. Thanks Eddie, great article, great Jeep...But thanks for nothing. 😉

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13_gecko_rubi said:
The other great thing about those PRO 1550s is being able to run the 1550/SPL70 u-joint. It's hard to tell looking at the pictures just how massive they are compared to a standard 60 u joint. Very nice upgrade!
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I'll have to see if I have a comparison shot to post up. The 1550/SPL70 u-joint is crazy big :crazyeyes:
 
krdadlamb said:
Great! Just GREAT! I've finally got my wife talked into how much better our Jeep will be with 37s, but we'll need to spend the $6,500 for the PR44 front axle and rear shafts, to do it right. Now, after reading this, all I want is 40s and a 72.5" axle with 1550 knuckles. Not sure how much this setup​ costs, but I'm sure it's double what my "approved" budget is. Thanks Eddie, great article, great Jeep...But thanks for nothing. 😉
Click to expand...

:cheesy: Sorry about that :crazyeyes:
 
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