Sip rim and billet hub problem

[TS1-200]

Having a problem fitting a Sip rim to a pepperpot billet hub, don't know the make of the hub as was on the scoot when a mate bought it the caliper is fouling the nuts and valve , any thing that can be done ? or will it just not fit, any ideas

[GP240]

Hi TS1-200, its a PM tuning front disc brake.

I have the same one which I took off a bike I just bought.

I also want to fit a SIP tubeless to it but after looking on PM's site it looks like it will need the centre hub changing to another type that will take the tubeless rim.

I will prob call in at PM and see what will be needed to change over (be a while yet tho).

Have a look at the PM Tuning site, it will give a clue as what needs to be changed, or give em a ring and discuss it.

All the best bud, Dave.

[GP240]

Hmmm, after looking at your pics again, I would think you could just turn the centre piece round and bolt your wheel on from the right-hand side.

2 problems tho,

1, the front tyre would need to be changed round too (rotation).
2, The bolts which are threaded into the centre 'spinner' are hex-heads, I thought these should be allen button heads, not sure if it would be a problem.

PM do offer longer bolts with the disc-brake when using AF/SIP rims.

Surely someone on here has changed from split to tubeless using this brake ?

[TS1-200]

Thanks for that info, I will speak to PM's in the morning, see what they say, unfortunately the wheel fixes to the same side of the hub as the calliper and I can't see how you can change that.

[a.lo]

is that hub in the wrong way round? all the ones i've seen the disc is on the right, else how would you route hyd. hose.

[Wack]

The three Allen bolts that hold the disc allow the hub to be split and turned around so the disc can be fitted on the offside and the cone and spinner face on the near side.

[hullygully]

take the SIP wheel off, turn the hub thru' 180 deg, so that the disk is on the R.H. side of scoot, take the caliper/anti dive off & spin that thru' 180 deg, take bolts out & screw them in from the R.H. side, take the speedo off & position it on the R.H. side (really its just a mirror of what you have now)

[carlos fandango]

i did it to mine a few years ago.


Theoretically it is just a simple case of taking the hub apart turning the centre piece around and bolting back together. Then fitting the hub back on with the disc on the offside.
but i had to machine part of the hub down, but i cant remember why .........but should become obvious when you try.
The other problem it the speedo drive , with this now on the nearside , it will spin the cable in the wrong direction for the speedo to work.
This can be overcome , if you carefully take the brass plug out and the opposite threaded speedo end out and swap around , they arnt meant to be removable and are crimped in , but will with gentle persuasion

[GP240]

Thanks for the help, the other thing to note is the calliper (in the photo and mine) is a 'left hand' only.

I have got me head round it now, cheers all.

[carlos fandango]

Why is it left hand only ?
Mine works both ways ? I just swapped the bleed nipped over with banjo bolt .

[carlos fandango]

Just remembered what and why I had to machine hub ..........
The center disc /spinner is not exactly central in its std, set up but the rims will be . Just as a std hub is not central ,ie it's the thickness of one rim steel, over to the right to allow the two rim halves to sit central to the links. .....does that make sense ??

So when the center disc /spinner is flipped over this off centering is magnified . Only solution is to machine the one half of the hub , where it sits against the centre spinner. It was the caliper side from memory .
Hope this helps.
Russ

[GP240]

Right Russ, I didn't think the 'nipple and bolt' was the same size thread, making it handed.

I will check position of wheel when I change the spinner over but will prob leave the brake on the left side and speedo housing to the right.

[Warkton Tornado No.1]

Just remembered what and why I had to machine hub ..........
The center disc /spinner is not exactly central in its std, set up but the rims will be . Just as a std hub is not central ,ie it's the thickness of one rim steel, over to the right to allow the two rim halves to sit central to the links. .....does that make sense ??

So when the center disc /spinner is flipped over this off centering is magnified . Only solution is to machine the one half of the hub , where it sits against the centre spinner. It was the caliper side from memory .
Hope this helps.
Russ

Russ.

What you've said makes sense.

I just thought I’d point out that I believe SIP rims are a tad ‘non-central’ in any case so I guess that if there’s any hub skimming/adjusting to be done, that needs to be taken into account.

If that makes sense!