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Are there any trunk racks that snap onto pannier racks?

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Are there any trunk racks that snap onto pannier racks?

Old 08-03-18, 08:03 PM
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Are there any trunk racks that snap onto pannier racks?

I have a new Trek Super Commuter 8s and it has pannier racks but no trunk rack. The fender is integrated into the stock setup and I'd like to keep that. Trek makes a rack that I could use if I pull the current setup but I'd lose the fender.

So I was hoping - and have been searching for - a trunk rack that would clip or mount to the top of the panniers.

Has anyone seen one?
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Old 08-03-18, 09:19 PM
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Performance bike sells the Transit Seatpost Rack. It doesn't attach to the pannier rack but as its name states, it attaches to the seatpost. It will fit your bike well. There used to be two models; one with a quick release and one that attaches with four bolts. I have the four bolt model which works well. I'm sure other companies make similar products.
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Old 08-03-18, 09:30 PM
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Check out the offerings from Topeak:
https://www.topeak.com/global/de/products/
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Old 08-04-18, 08:32 AM
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Originally Posted by MadProphet View Post
I have a new Trek Super Commuter 8s and it has pannier racks but no trunk rack. The fender is integrated into the stock setup and I'd like to keep that. Trek makes a rack that I could use if I pull the current setup but I'd lose the fender.

So I was hoping - and have been searching for - a trunk rack that would clip or mount to the top of the panniers.

Has anyone seen one?
Some editorializing first: That's just a stupid design! Not everyone needs panniers every time they go for a ride. The rear deck of racks is more useful than the sides for most commuters. If nothing else, it gives you some extra space. And what is the fender made of? Metal or plastic? Metal is too heavy and plastic is too delicate for a support member. And what happens when you put a load on the "rack", does it push down on the fender and cause tire rub? 'Tis a dumb idea.

Now that's off my chest, a solution. Ditch the stupid rack. Get a real rack with a real deck. You will probably have to use P-clips to hold the upper stays on the rack. (I would suggest Tubus rack clamps over p-clips because they are stronger and easier to use.) Attach the fender to the seat stay bridge either with a bolt (hopefully there is one under the bridge) or with a ziptie. You'll have to drill a hole (maybe two) in the fender. I just found out that they make these cable tie mounts which should be perfect for this application if you don't have a bolt. You could use a nylon screw to keep the weight down since this doesn't have a load on it.
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Old 08-04-18, 03:30 PM
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First, some clarification. The pannier / fender combo on the 8s doesn't use the fender as part of the support for the combo, rather, the fender uses the rack as mounting points to be more secure than typical fenders. The rack itself is quite beefy and the combo seems to work well.
Which is why I was hoping I could find a trunk rack that simply snapped (with some form of "locking" to prevent it taking flight after a good bump) on to the existing setup. I have a larger Topeak bag that I can strap on using the velcro straps. The fender is strong enough not to bow but neither the bike nor the bag were meant to be used like this and getting the straps tight is an exercise in patience. Not my strong suit.
I'm not sure how many bikes offer a setup like this, so I've no idea whether offering my solution is something anyone has considered. Just hoping someone had seen one.

OH - and regarding seatpost racks, I added a Cirrus BodyFloat seatpost so that option is kinda off the table.
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Old 08-04-18, 09:17 PM
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Ortlieb makes a trunk bag that attaches to the rails of most racks.

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Old 08-05-18, 08:59 AM
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I have an old Trek Interchange rack and trunk bag that snap together perfectly but I don't know if all Trek racks are Interchange compatible, ever were compatible, or if the Interchange system is still a thing.

I do like the rack and trunk bag and think it would be worth asking a Trek dealer or perhaps submitting the question to Trek directly.
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Old 08-05-18, 10:19 AM
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Originally Posted by MadProphet View Post
First, some clarification. The pannier / fender combo on the 8s doesn't use the fender as part of the support for the combo, rather, the fender uses the rack as mounting points to be more secure than typical fenders. The rack itself is quite beefy and the combo seems to work well.
Which is why I was hoping I could find a trunk rack that simply snapped (with some form of "locking" to prevent it taking flight after a good bump) on to the existing setup. I have a larger Topeak bag that I can strap on using the velcro straps. The fender is strong enough not to bow but neither the bike nor the bag were meant to be used like this and getting the straps tight is an exercise in patience. Not my strong suit.
I'm not sure how many bikes offer a setup like this, so I've no idea whether offering my solution is something anyone has considered. Just hoping someone had seen one.

OH - and regarding seatpost racks, I added a Cirrus BodyFloat seatpost so that option is kinda off the table.
I think you underestimate the role of the fender. Looking at pictures of the rack attachment, it appears to be quite conventional. It's just a bolt through an eyelet. There is nothing keeping the rack from rotating forward or backwards except the fender attachment. In other words the fender serves the same function as rack stay for a regular rack. If you were to unbolt the fender from the rack, the rack would simple rotate forward or back just like a "normal" rack if you removed the upper stays.

As for attaching something for a deck, I just don't see how it could be attached. You would have to build something for a trunk bag to rest on using the ends of the rack that extend up past the fenders. That's not going to be trivial. And if you got a bag with velcro straps, it wouldn't be all that stable for the attachment. It would have to balance on the round parts of the rack and would tend to tip from side to side.

If you want a deck on the rack, you'll either have to do the seatpost rack mount...Uff!...or just get a better rack.

Originally Posted by alan s View Post
Ortlieb makes a trunk bag that attaches to the rails of most racks.
But they still need to be racks with flat tops. None of the trunk bag mounts that Ortlieb has offered in the past or now would do the job. They simply can't attach to that configuration.
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Old 08-05-18, 12:01 PM
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I stand corrected. Furthermore, after I actually spent more time than just a passing glance, I realized how substantial the fender is. The front is plastic and not exactly tough. The rear is metal (and indeed does more than just ride along with the rack) and solid.

I think my ideas are not being visualized the way I'm intending. I know the existing setup is strong since I read Thule has a child seat that can be mounted.

In the end, it was just a question I had for a product I thought might be useful.
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Old 08-05-18, 12:09 PM
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Originally Posted by alan s View Post
Ortlieb makes a trunk bag that attaches to the rails of most racks.
Ortlieb Trunk Bag RC (roll closure --- new one), and Ortlieb Trunk Bag (zipper --- the original one).

I just bought one, and it's quite nice, except the clips are designed to be reversible, with this feature facilitating their use on wider racks --- unfortunately, my rack has a solid bar under it which interferes with operating the release mechanism when its reversed, so I've found it somewhat problematic (and of course, it had to bump off at a bit of construction on the first day I used it, so wound up with some holes which I need to have repaired (under their warranty).
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Old 08-05-18, 01:24 PM
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Topeak Quicktrack

Originally Posted by elcraft View Post
Check out the offerings from Topeak
Great supplier for trunk racks and rack packs! Check the Quicktrack system (:
topeak.com/global/en/technology/10-quicktrack%e2%84%a2

topeak.com/global/en/products/rear-rack-bags/122-mtx-trunkbag-dxp
topeak.com/global/en/products/racks

Last edited by angerdan; 08-05-18 at 01:29 PM.
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Old 08-05-18, 02:41 PM
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The Ortlieb trunks deserve a closer look. If you take a look at pictures of my bike, you'll see the fender rises a bit above the pannier rails, so my only question will be if the mechanism Ortlieb uses will permit that height difference. Might be worth an Amazon order. I've had their products before on my recumbent trike and I know they are high quality.

If I were a bit more mechanically inclined, I'm quite sure an afternoon with a welder and some steel rod would yield a more perfect solution.
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