Isis BB need help

[Imlach]

Hi,

Installing an ISIS BB on my surly but I can't get the drive side to go further in than shown in the image, feel like I have to use undue force. It threads on perfectly smooth all the way until it gets to the point shown. Do I just crank down and hope to get it in further?

 

[Imlach]

Also I believe this bb works for both 68 and 73mm, am I right to believe that perhaps its not meant to go in further seeing as there's an orange line where it stops at?

Here's what I am using

https://www.cykelgear.dk/reservedel...MI74PPoJ6A9wIVr5BoCR0XgwnXEAQYAyABEgKjefD_BwE

 

[iveto1983]

68mm shell on your Surly?
BB’s that are compatible with both 68/73mm shells will typically need 5mm of spacers in a 68mm shell and no spacers in a 73mm shell.

The orange line is probably some type of thread adhesive.

 

[Imlach]

It only comes with 1 spacer for the non drive side and there's a rubber ring round the non drive side as well.

 

[Imlach]

And yes, 68mm shell on my surly

 

[Imlach]

I now tried it with the 1 spacer on the drive side, still doesn't get anywhere near. I tried using extra torque but after a while the spindle stops running smooth and starts sticking

 

[iveto1983]

Might be that one spacer is to fit on the drive side when you aren’t fitting an e type front mech or chain guide on a 73mm shell.

I’d say you need to get 2 x 2.5mm bb spacers.

 

[Imlach]

Might be that one spacer is to fit on the drive side when you aren’t fitting an e type front mech or chain guide on a 73mm shell.

I’d say you need to get 2 x 2.5mm bb spacers.

I have additional spacers to fit to test but my concern is that that there won't be enough non drive side spindle once I add the non drive Cup

 

[Imlach]

2 spacers fitted, I torqued it down as hard as I could and I'm a 300 pound fella but the spacers aren't even snug against the frame, I can move them slightly

 

[iveto1983]

Is this with 2 spacers on drive side and one non drive, or one each side?

Spindle will be fine on non drive side as it’s made to work with a wider shell.