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Bike rack solution for commuter?

Old 06-11-19, 07:21 PM
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timk225
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Bike rack solution for commuter?

Just got a single speed bike (6KU Fixie) in hopes of having it as my new commuter. Also bought the Planet Bike Eco Rack to go along with an Ortlieb pannier I was given. My bike has no eyelets/braze ons, so I'm trying to figure out the best solution. 4 P-Clamps? 2 P-Clamps at the bottom and a seat post clamp with eyelets? Any ideas?
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Old 06-11-19, 09:05 PM
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Seatpost clamp rack mount and a pair of p-clamps at the bottom. The clamp rack mount works best with larger frame sizes where the clamp is close to level with the rack. On small frames the rack front support arms will angle down sharply and pinch together very closely at the clamp and overall the rack will be a bit wobbly with heavier loads. There are rack mount clamps available that simply wrap around the post and don’t serve as the seatpost clamp. You can raise that type of clamp up on the seatpost to match the height of the rack and avoid the sharp bends to the support arms.

Unsolicited advice — put a small piece of frame saver tape around the seat stays before mounting the p-clamps at the bottom. When you eventually decide to remove the rack, your frame will still look pretty.


-Kedosto
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Old 06-11-19, 10:23 PM
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If you must, Topeak makes a rack that clamps to the seat post and has lower struts for side bags. I’m sure they’re not the only ones. But really, a backpack or messenger bag would go better here.
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Old 06-12-19, 12:48 AM
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Tubus P-clamping system.

https://www.sjscycles.co.uk/carriers...stay-mounting/

Read the reviews.

Don't buy parts at a hardware store to make it work, but a nice system (this one will minimise paint damage and facilitate a secure fitting.)

Different diameters exist:

https://www.tubus.com/en/products/ac...uct/clamp-set/

Last edited by acidfast7; 06-12-19 at 12:55 AM.
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Old 06-12-19, 12:59 AM
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Originally Posted by acidfast7 View Post
And for the bottom https://www.sjscycles.co.uk/carriers...nting/?geoc=AU you could easily drill the holes out for a 10mm axle. Or make your own out of flat bar, 10mm hole, 5mm hole, hose clamp around bottom of rack stay and flat bar to stop it rotating.
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Old 06-12-19, 01:13 AM
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Originally Posted by Trevtassie View Post
And for the bottom https://www.sjscycles.co.uk/carriers...nting/?geoc=AU you could easily drill the holes out for a 10mm axle. Or make your own out of flat bar, 10mm hole, 5mm hole, hose clamp around bottom of rack stay and flat bar to stop it rotating.
Correct. I should've posted that as well (too early in the morning for me mate, you're quite ahead!)

the tubus stuff is top notch.
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Old 06-12-19, 06:20 PM
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Since I don't have at the bottom?

I have a Planet Bike Eco Rack. https://www.planetbike.com/store/eco-bike-rack-599.html

Last edited by timk225; 06-12-19 at 06:31 PM.
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Old 06-12-19, 07:47 PM
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I’m not a big fan of mounting at the axle because any time you remove the rear wheel, the rack gets involved. If you go with the p-clamps at the seat stays you can flip the bike and pull the wheel and the rack is not involved. Though the axle solution does look cleaner.

Years ago I tried a axle mount solution from Axiom (can’t recall for sure) and it was a pain in the butt.


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Old 06-12-19, 07:49 PM
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Thanks, that's helpful.

At this point, I'm between doing 4 P-Clamps for my Eco Rack or buying a seat post rack that has clamps on to my seat stays. Not sure which one is better...
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Old 06-13-19, 09:28 AM
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Originally Posted by timk225 View Post
Thanks, that's helpful.

At this point, I'm between doing 4 P-Clamps for my Eco Rack or buying a seat post rack that has clamps on to my seat stays. Not sure which one is better...
I would try the P-clamps first. They are cheap and normally very solid. If it does not work you can always switch to a seat post rack. I just don't know how much load a seat post rack can take if you have loaded panniers. I have also seen racks being mounted to the seat post clamp like this one.
https://salsacycles.com/culture/bett...lternator_rack
I actually did this on one of my kids bikes by bending these long flat attachment arms that came with the rack.
https://www.amazon.com/Topeak-Extra-...16959481&psc=1
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Old 06-13-19, 01:14 PM
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4 P clips. 2 on top 2 on the bottom.. it's a 'been done many times' solution..
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Old 06-14-19, 10:11 AM
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4 P Clamps would be my vote, on a fixie you don't want the rack setup interfering with chain tensioning by moving the rear wheel in the horizontal dropouts.

And, mounting the rack on the seatpost could impede saddle height adjustments, if you're a fan of doing this frequently..
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