Panniers on race bike, alu frame and no mounts
richrock
Posts: 77
I'm looking to increase my luggage slightly, and am considering a rear pannier rack. My Camelbak (blowfish) isn't quite man enough with change of clothes, toolkit, spares, plus all the other bit's n bobs I'm having to carry. Plus I'd like to be able to take my laptop in once or twice a week.
My road bike (Carrera TDF
) doesn't have any pannier mounts. I've looked at the seatpost variants, but the total weight with laptop is too much for these to handle, plus I'd think my frame would snap on the lovely smooth asphalt roads ( :shock: ) - I meant potholed tracks. :roll: - no really, it's an A-road, not that you could ever tell. 
So, I looked at the possibility of mounting it using rubber-covered p-clamps, a sensible alternative. Yet I then found people say that I should never ever ever ever mount anything to an alu frame using this method.
Is this correct? My main choice was the Blackburn MTN rack, because there are hardware kits to fit to the frame. My alu frame is 6061, so I'm unsure if that will make any difference.
Is there any other alternative I haven't thought of? I'd like to ditch the backpack and increase luggage potential, especially for carrying some extra groceries too on occasion.
My road bike (Carrera TDF
) doesn't have any pannier mounts. I've looked at the seatpost variants, but the total weight with laptop is too much for these to handle, plus I'd think my frame would snap on the lovely smooth asphalt roads ( :shock: ) - I meant potholed tracks. :roll: - no really, it's an A-road, not that you could ever tell. So, I looked at the possibility of mounting it using rubber-covered p-clamps, a sensible alternative. Yet I then found people say that I should never ever ever ever mount anything to an alu frame using this method.
Is this correct? My main choice was the Blackburn MTN rack, because there are hardware kits to fit to the frame. My alu frame is 6061, so I'm unsure if that will make any difference.
Is there any other alternative I haven't thought of? I'd like to ditch the backpack and increase luggage potential, especially for carrying some extra groceries too on occasion.
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Comments
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The reason people say you shouldnt use P-mounts on an alu frame is there is, on cheap frames, the danger of deforming the tubing if you over do it which would then reduce the ability of the tube to handle compressive forces and alllow the frame to buckle. Personally, if there is sufficient rubber between the mount and the tube, I'd be surprised if you could put enough compressive force into the mount to do this. I could understand doing this on a carbon frame would be maybe more of an issue because carbon is, arguably, less forgiving to local stressing. Unless you plan to carry many kg I dont think you should worry. btw, worst-case, i carry a 3.3kg laptop, charger, clothes, shoes and a washkit/towel in the pannier and its all up weight is <7kg which honestly for an alu frame is nothing.
(for the scientific, to crush a 25mm 6061 tube with a wall thickness of 1mm requires 25N/mm^2, or, putting it another way, if the p-clip was 10mm wide you'd need to close it with a force of about 12,500N to crush the tube - no way you could get close to that with the usual M5 or M6 bolt! *NB rough calcs not checked* )Invacare Spectra Plus electric wheelchair, max speed 4mph
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seat post racks can take 10 kg afaik thats 22 llbs of stuff "
My carrera tdf has a seatpost rack and i carry ...
pump
tools
2 inner tubes
repair kit
chain repair link
tyre boot
change of clothes for work (shirt ,trousers ,pants,sweat shirt)
sandwiches
windproof
rainlegs
spare buff
spare gloves
Coping fine with it all.
FCN 3/5/90 -
Mine has mounts on the bottom to attach the legs of a rack , you could get a seat post clamp with a rack extension and mount a full time rack that way .
like ...
FCN 3/5/90 -
cyberknight wrote:Mine has mounts on the bottom to attach the legs of a rack , you could get a seat post clamp with a rack extension and mount a full time rack that way .
like ...
Was about to suggest the same thing, I've just got a bike with no racdk mounts, and came across this: http://cgi.ebay.co.uk/Bike-Seatpost-Cla ... 27b156f9c1
Seatpost clamp as pictured by previous poster, looks a great idea, convenient solution. I used to have a seatpost rack but found that it swivelled at times and connected with the wheel, no matter how tightly I did it up - put me off using it. Plus it was HEAVY!!!It may seem there's light at the end of the tunnel, but it's actually an oncoming train.0 -
I use something similar to the quick release above. A bit expensive but works well. Only issue is having to remove the skewer and fiddly washers if you get a flat, but that isnt too often (touch wood)
http://www.wiggle.co.uk/tubus-fly-rear-rack/0 -
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