Scott Addict R3 tyre rub advice

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terrible1
Posts: 98
Joined: Tue Dec 15, 2015 10:45 pm

by terrible1

I am experiencing a tyre rub issue with my Scott Addict R3 frame and seek some advice from the experts of this board.

The rim is an H Plus Son Archetype 23mm and the tyre a Vredestein Fortezza Senso 25mm. The wheel rubs the non-drive side chainstay when out of the saddle and cranking. This does not always happen so unfortunately I have periodically reset the wheel and continued to the point that there is a 1mm deep (estimated) groove in said area.

I believe this rub has worsened since I popped two spokes and had the wheel re-trued by LBS. I am not sure they dished the wheel sufficiently and since then it has rubbed more without my awareness. Can a wheel be further dished to significantly move wheel-line 5mm to the right?

Now, I know this is not safe to ride but due to finances and need to cycle I have not much choice in the present moment. Exactly how unsafe is it in its worn state? How thick is the carbon in this area? Will it wear through to become an elongated hole yet still retain rigidity? This is madness talking, I know.

I am thinking I must abandon the frame or sell it (how much of value lost due to wear?) and get a new frame, at least for peace of mind when thrashing the bike and descending on bumpy roads and such.

It is quite a conundrum, as the frame is about a year old (bought second-hand), with about five thousand miles on it, and I have worn a dangerous groove into it. :oops: Thanks for any advice, I am unsure what to do.

by Weenie


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ukracer
Posts: 134
Joined: Sat Nov 14, 2009 4:41 am

by ukracer

I have seen similar issues trying to fit 25 mm tyres on my addict.
I think it's due to the drop outs slightly offset and when wheel is pulled in fully they leave the wheel not central .
Not sure on safety of the frame tho do you have pic?

terrible1
Posts: 98
Joined: Tue Dec 15, 2015 10:45 pm

by terrible1

Thanks for your reply. I will get some pictures tomorrow and post them. The dropouts are definitely offset. I have read this Addict issue is affected more with use of hubs that are/not catridge bearing hubs? My hubs are quite cheap, if that indicates which variant it is more likely to be.

The Scott Addict is seemingly known to have dropouts susceptible to being 'eaten into' from the inside by overly-tight hubs. I have thought about using spacers threaded onto the QR axle on the inside of the left dropout to create some space, though am unsure if this is safe in itself, and of course I have already worn said groove into frame.

With regards to having the frame replaced/any Scott assistance, does anyone know protocol on this? The frame that I bought second-hand was itself a warranty replacement frame, and I do not have the original owner's receipt work.

As you see, an endless rabbit-hole of slight inconveniences.

The only initial fix seems to be to switch down to a 23mm tyre and have wheel re-dished to achieve further right line.

mimason
Posts: 654
Joined: Tue Feb 24, 2009 11:43 pm
Location: Florida

by mimason

Ride 23s!

defride
Posts: 142
Joined: Fri May 09, 2014 4:26 pm

by defride

Are the dropouts carbon without alu inserts? If so you may find there's wear on the dropouts. I've had this issue with one of my frames, a carbon specialist I've contacted says it's a common problem (whether or not it's the issue you have).

The good news is it's repairable if you have access to a carbon specialist. Manufacturers generally fob the issue off as wear or incorrectly tightened q/r's. The carbon guys say poor design...

I'm running 23's until I can get around to striping and sending the frame off for repair.

eric
Posts: 2196
Joined: Tue Nov 11, 2003 9:47 pm
Location: Santa Cruz, California, USA
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by eric

If you don't have a dish gauge, remove the wheel and put in backwards, then check the clearance. If it's different then the dish is off.

Is the wheel out of true? Are the bearings loose?

by Weenie


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GorrGrimWolf
Posts: 136
Joined: Sat Jan 04, 2014 6:26 pm

by GorrGrimWolf

I used to have this one on BMC RM01, the carbon drop-outs has been eaten inside and I wasn't even using to much force to close the QR skewers. I had a lot of wheel rub on the inside of left chainstay since the wheel wasn't precisely straight in the bike anymore.

BMC has warranty that frame no questions asked and I would never buy a bike with carbon dropouts again. I see steel inserts as a more durable solution.

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