Race Face Turbine standard

[abelsfc]

Hello,
anyone knows if RF Turbine square is made following ISO or JIS standard?
I need to replace my bottom bracket and I would like to make the right choice.
Thanks.

[grandsalmon]

I am sure it will be nice to get a consensus, but I'm virt-certain it's JIS.

(Been running the Turbine since talking RF in sending me one in '94, and still in service. 6 more on bikes, 4 beauties in the bin waiting.)


.

[abelsfc]

I am sure it will be nice to get a consensus, but I'm virt-certain it's JIS.

(Been running the Turbine since talking RF in sending me one in '94, and still in service. 6 more on bikes, 4 beauties in the bin waiting.)


.

In that case, it's a bit weird why they made JIS cranks, while their Taperlock BB is made following ISO rules.

[iamkeith]

Just adding to the concensus: I too have several of the 90's Turbines in service and a couple more hoarded for future use, and use JIS. I'm not familiar with the "taperlock" system, and will now research it because you've gotten my curiosity up...

[1 cog frog]

Maybe I'm a dummy, but is there more than one standard for square taper? I thought all square taper cranks and bottom brackets had the same 2 degree taper standard.

I only started riding in '93 so I am bit wet behind the ears.

I did have a RaceFace Taperlock BB and it worked fine with all the square taper cranks I put on it. I am pretty sure Taperlock is just a fancy name RaceFace gave their BB's and Cranks.

frog

[abelsfc]

Maybe I'm a dummy, but is there more than one standard for square taper? I thought all square taper cranks and bottom brackets had the same 2 degree taper standard.

I only started riding in '93 so I am bit wet behind the ears.

I did have a RaceFace Taperlock BB and it worked fine with all the square taper cranks I put on it. I am pretty sure Taperlock is just a fancy name RaceFace gave their BB's and Cranks.

frog

Well, Taperlock is the name of the model. As you can see here http://www.retrobike.co.uk/gallery2/...2_itemId=21982 the spindle is made following ISO standard. I need to buy a new BB and a wrong interaction between ISO BB and a JIS crank could result in changing my chainline, which is perfect nowadays, and also the low Q-factor Im ridding now. Sheldon Brown says that there could be a 4.5mm changing in each crank side, using a standard or the another one.

[umarth]

Ah, this would be so much more interesting for me if the non drive side crank didn't just round out on me... Anywho, had a un71 bb that worked fine for many, many years.

[abelsfc]

Lucky guy, my UN72 worn out only 2 years after buy it with no more than 10.000km.

[iamkeith]

A quick seacrh of the web seems to indicate that there's quite a bit of disagreement as to whether the Taperlock was actually ISO or JIS anyway. Since JIS is easier to find and most people seem to agree that the chainline is the only real negative to mis-matching, you could just adjust the spindle length as required when you buy.

This might help: On a 103mm symetrical JIS spindle, the middle ring of a Turbine sits at a 46mm chainline. You can do the math to adjust from there. (Take the difference between 46mm and the chainline you wish to achieve, double it, and add to 103mm)

If you want some ability to fine-tune, just get a Phil bb. It has cups like the Taperlock that will allow you to adjust the chainline 5mm either way.

(It turns out I also have a Taperlock bb in service but, unless someone REALLY needs me to, I'd rather not pull it apart to see if it is in fact a ISO taper [assuming I can even spot the difference] and what the spindle length-to-chainline relationship is.)

[abelsfc]

A quick seacrh of the web seems to indicate that there's quite a bit of disagreement as to whether the Taperlock was actually ISO or JIS anyway. Since JIS is easier to find and most people seem to agree that the chainline is the only real negative to mis-matching, you could just adjust the spindle length as required when you buy.

This might help: On a 103mm symetrical JIS spindle, the middle ring of a Turbine sits at a 46mm chainline. You can do the math to adjust from there. (Take the difference between 46mm and the chainline you wish to achieve, double it, and add to 103mm)

If you want some ability to fine-tune, just get a Phil bb. It has cups like the Taperlock that will allow you to adjust the chainline 5mm either way.

(It turns out I also have a Taperlock bb in service but, unless someone REALLY needs me to, I'd rather not pull it apart to see if it is in fact a ISO taper [assuming I can even spot the difference] and what the spindle length-to-chainline relationship is.)

Well, as I replied to another member, RF Taperlock BB is ISO, as you can see here http://www.bike-components.de/bedien..._square-bb.pdf
What you say it's interesting, because now I have a 107mm JIS spindle and my RF Turbine chainline is about 47.5 - 48mm, so it agrees.
Tomorrow I'll do a test: To check how far goes into the spindle the Turbine cranks, and some Shimano Alivio cranks (they are JIS for sure). I'll comment here.

[unicrown junkie]

Maybe I'm a dummy, but is there more than one standard for square taper? I thought all square taper cranks and bottom brackets had the same 2 degree taper standard.

I only started riding in '93 so I am bit wet behind the ears.

I did have a RaceFace Taperlock BB and it worked fine with all the square taper cranks I put on it. I am pretty sure Taperlock is just a fancy name RaceFace gave their BB's and Cranks.

frog

There are at least two types of tapers out there, probably more. Fortunately though in this case the other taper is a Campy design, and I don't think the OP has any Euclid parts on their bike?!

[grandsalmon]

In that case, it's a bit weird why they made JIS cranks, while their Taperlock BB is made following ISO rules.

Leave it to me, the one time (ha!) I put my supposed empirical-based suggestion forward and... no good. Sorry mate.

I guess I've been lucky to hold onto quite a few taperlocks. All the Turbines in service are running on them, except one that is paired with a 103mm - i think JIS, on a road bike.

(I have a world class and a GT titanium in the wings, think they're the same maker. I'll check their tapers v the Tlocks I have out.)

I've been getting away w 107 and 110 taperlocks for all the applied to mtb's, and getting my very-nice chainline. In the past, I'm sure I have run them w un-72's i.e.
And now I think about it, that was a time I had gone over to Sheldon's to suss some of this mix&match out. Also ran a Campy Euclid crank on a 72 for many years, never sure that was a fit, but it worked for a 'round the world.

[abelsfc]

Definitively I think they are ISO. Today I installed Alivio cranks (JIS) on a Shimano spindle (JIS), and the Shimano's go further into the spindle like 2-3mm in each side in comparison with RF Turbines, having a considerable more contact surface between spindle and crank. I think I'll look for an ISO bottom bracket to replace the actual one.

[rockyuphill]

Turbine installation instructions referencing the installation on a standard Shimano UN-52 BB .

[IZH-35M]

Hello,
anyone knows if RF Turbine square is made following ISO or JIS standard?
I need to replace my bottom bracket and I would like to make the right choice.
Thanks.

RaceFace JIS

[abelsfc]

RaceFace JIS

If It were JIS, how do you explain that Alivio goes 2-3mm further into JIS spindle than RF Turbine?

[abelsfc]

OK, doubt solved. I asked to Race Face and their engineers answered me this:

Race Face had their own standard that was between the two.
Generally speaking, if you installed one of our cranks onto a Shimano (JIS) type spindle, it would stand-off further than if you installed it onto a Race Face spindle. This said, with the tolerances of the crank taper socket and the spindle end taper, the fit could easily overlap between ours and Shimano. There are other spindles out there that just wouldn’t work (either too big or too small) simply based on specs or tolerance control of the manufacturer. Also, if you apply grease to the spindle end or not, or how much torque you would apply, or how many times you had removed it and re-installed it also had a huge effect on the exact chainline.

Hope this helps.

[DeeEight]

I was gonna say JIS but they didn't use an asymetrical spindle like shimano did, so in that respect, they followed the ISO norm of equal length spindle ends (measuring from bearing outwards). So the chainlines don't match up the same way. That's why raceface BBs employed double adjustable cups... so you could shift the spindle to adjust the chainline. If you just installed one like you would a shimano BB, and installed a shimano crank onto it, the chainline was going to be off.

[colker1]

They have their own standard... what a great idea.