Nashbar Waterproof Front Panniers

I needed a set of front bicycle panniers for my upcoming West Coast ride. Since it will be rare that I’ll need more storage capacity than my Ortlieb Backrollers offer, I didn’t want to spend a lot of money. Nashbar was running a discount on their waterproof front panniers (NA-WPF2-K), putting them under $40. At that price, they would be worth buying even if they only lasted for one trip.

Design

The bag appears to be made out of PVC-coated nylon. It has both a roll-top inner closure, plus an outer cover which snaps down. Each bag has two stout metal hooks which attach to the top rail of the rack. Attachment to the lower rail is via elastic and a metal hook. The lower attachment system seems low quality, but it functions surprisingly well.

Front:

Rear:

Roll-top closure:

Upper mounting hooks:

Lower mounting hooks:

Modifications

Next to each upper hook, there is a Velcro loop. This should function to prevent the bag from moving too far upward and coming unhooked. In the event that it does come unhooked, I imagine that the Velcro loops would keep the bag on the bike. Given the relative strength of the steel hook and Velcro loops, I do not think that the loops are intended to carry the full weight of the bag in normal use!

Since the loops extended beyond my Jannd Extreme front rack, I added a loop of paracord through which I can secure the Velcro loops. I used a double-fisherman’s knot, so it won’t slip when loaded.


Many reviews mention that the rivets fail. Looking at them, I can imagine how easily this would happen under load:


In order to assure that I can’t experience complete failure, I drilled out the upper rivet in each hook and replaced it with a stainless steel bolt. I used a fender washer — which has a large diameter — to spread the load across a larger area of the bag liner. I also used a regular washer in order to make the nut fit without exposing any bolt threads, since I didn’t want things catching on the bolt.







A more glaring problem is that of the lower hooks. They literally just slip through the elastic and are held there by gravity or tension. Without tension, it takes only mild jarring to cause them to work their way free. In fact, I lost one hook within the first week, when I took the bag with me down to the hardware store!


I absolutely recommend that anyone who buys these bags immediately modify the elastic in order to retain the hook! You could simply use a zip tie, though made a quick stitch with a sewing machine.


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Bicycle Wheel Bearings

I’m looking for replacement bearings for a Shimano M760 XT rear hub. According to Shimano’s technical documents website, it uses 1/4″ bearings, nine per side. The lowest price I found for bicycle bearings was 25 for $4.80 at JensonUSA.

However, by going to McMaster Carr, an industrial supplier, I found a package of 100 bearings for only $4.24 (part number 9528K15). These are Grade 25, just like the JensonUSA bearings.

Regarding the grades of bearings, according to Wikipedia, inch-size ball bearings are graded from 1000 to 3, where smaller numbers indicate higher precision. It appears that Grade 25 is commonly used on higher end bicycle components, with Grade 300 on some low-cost parts. Different materials are available, such as stainless steel. Harder bearing materials should not be used, as this will cause the bearing races to wear out rather than the cheap and easily replaced ball bearings. Also be aware that steel balls are not the same as ball bearings, are much harder, and should be avoided for the same reason.

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