The Expanding Yoga-Mat Compatible Bicycle Basket




Introduction: The Expanding Yoga-Mat Compatible Bicycle Basket

This instructable shows you a surprisingly easy way to make a rear bicycle basket that expands in length to accommodate longer loads such as an exercise mat, baseball bat or, um, French baguettes.

The problem:
This was inspired by and created for my beautiful wife Jodie, who is a yoga teacher, and really enjoys riding her bike to the community center and to the yoga studio and area churches where she teaches.

She has an extra thick, extra large yoga mat. I would call it instructor-sized. t took along time for us to find a bag that it fit in. Also, she frequently has to carry CDs, handouts, text books, straps and more in this bag. I've slung it over my shoulder and it's pretty heavy and would cause excessive sweating were I to ride my bike around with it on my back.

Finally, on more than one occasion we realized she couldn't stop at the grocery on her way home to pick up an item or two as she didn't have a good way t carry the parcels.

The solution:
I resolved to find a bicycle basket that would expand to fit her mat, but retract when not hauling long cargo. Also, I needed it to be reasonably priced. But after extensive searching online and at area bicycle stores, I didn't find anything that satisfied me. Not even close.

So I decided to make my own.

Step 1: Things You Will Need...

There is a variety of things you will need for this project. Obviously, a bicycle, preferably one with a rear rack. If your bike doesn't have a rear rack, you will have to install one.

Do not use the seat-post only rear rack. Instead, use one with supports that attach near the reear wheel hub. These tend to run between $20 and $40 at bike shops, although when online bike suppliers like Bike Nashbar start clearing out their inventory at the end of each season, you can find then for $10-$15. I paid $12 for Jodie's.

You will also need a sliding under-cabinet wire basket. I used one by elfa that I bought at The Container Store - a two runner easy glider that was 12-7/8" x 16-7/8" x 8-1/2" h.

Finally, you will need a drill with bits for drilling metal, zip ties, wire cutters, two wire-lock pins and four small bungee cords (4").

Step 2: Attach the Basket's Rail Runners to the Bicycle's Rear Rack

I am going to assume the rear rack has been installed on your bike per the manufacturer's directions.

To attach the rear runner piece, lay it on top of the rear rack and mark four spots for holes in the cross pieces. These holes should be near a tube or edge of the rear rack. The wheels of the runners need to be facing out. The other end should not intrude on the seat area.

Drill the four holes. (Size them appropriately to your stock and your zip ties).

Zip tie the runner to the rear rack.

Note: I had experimented with other ways to connect the runner to the rack - I wanted easy on, easy off, and as it turned out, the zip ties worked best. You may work out something else. I'd love to know what it is.

Step 3: Modify the Basket - Remove One End.

Using the wire cutters, snip out one end of the basket.

Be sure to leave the two edge verticals in place, and the crossbar at the top of the basket. The basket form should still feel solid after you remove the square,

Step 4: Roll the Basket Onto the Runner - Open End First.

Roll the basket on to the runner with the open end first. You want to bring it up t the back of the seat and stop.

Next, mark this spot on the outside edge of the runner (both sides) and drill through both the runner's outer edge and the basket runner inside. The hole should be able to easily accommodate the wire-lock pin, which will hold the basket in place while riding in this position.

Once the holes are drilled, slide in the wire-lock pins and give the basket a shake.

Hopefully you just said "that ain't goin' nowheres." Out loud. To nobody.

Step 5: Slide Basket to Extended Position and Drill Wire-lock Pin Holes.

Remove the wire-lock pins and slide the basket to extended position.

You'll note that the further back you slide the basket, the more it wants to pull down. You are looking for the magic spot - long enough for your envisioned load, yet still balanced with the runners. When you find it, drill through the inner runner rail at the point of the existing hole on the exterior runner rail.

Slide the wire-lock pins in and give it a shake.

"it's a bit shakier, but it ain't goin' nowheres," you should be saying.

Feel free to refer to the extended basket as "X-wing position."

Step 6: Add Some Bungees and You're Good to Go.

As I mentioned, when our basket is in, we usually stretch 4 or five bungees across the open side. These are great to have on hand. If we go to the grocer, we can run them through the bag handles or milk carton handles.

If the load feels side-to-side wobbly, we run one on each side from the top of the basket to the wheel hub - it pulls things in and makes them more snug.

The golder rule here is this: Always put the heaviest part of the load over the tire." The milk and canned goods, for example, go over the tire, while the bread and cheetoh's are on the extension. By keeping the load over the wheel, the entire bike feels more balanced, and you handling unchanged by what you are hauling.

My wife has been very pleased with the expanding basket, and rides to her yoga classes almost four times a week. Another instructor at her studio has asked me t make her one as well. When we put my son's trail-a-bike on her bike, we just unclip the pins and slide the basket off.

Like I said, it's not for the heaviest cargo in the world, but for where we are in our lives right now, the expanding basket is perfect. It is a true enabler of bicycle commuting and bike errand running in our home, and (I hate to admit it) I feel really proud of it whenever I see her riding off to yoga.

Good times, friends, Good times.

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    12 years ago on Introduction

    I did something similar to add a milk crate to the back of my bike and I have an important warning. I had about 4 pounds worth of stuff in the crate and that was enough to throw off the equilibrium off the bike. I fell twice, the last one, injuring my knee and almost getting run over in the process. I have been riding for about 30 years and am an avid mountain biker. I think that it is safer to either wear a small back pack or saddle bags where the weight is further down in the center of gravity. Be very careful. Good instructable though, thanks for offering it.


    12 years ago on Step 3

    to help keep smaller items in the basket, when you're not carrying the yoga mat, you could keep the cut-out end, trim off the "poking-out" bits, and re-attach the bottom with zip-ties... fold it down and in so it lies flat when you want to carry the yoga mat, and flip it up and secure with bungees (weaving in and out) or something else, when you want to carry groceries, etc.


    13 years ago on Step 6

    I love it! Been looking for a rear basket and can't find anything that's not made of wire that's close to the flexibility of string, or not uber-expensive. Will implement this asap!


    14 years ago on Step 6

    This excellent idea will be very useful to me. Much appreciated. Vic


    14 years ago on Introduction

    Well done. I never thought of the wire cart business. That was very innovative and to the point. Trailers are bulky and take away from the quick parking advantage of cycling. I use to live in a bike city, and had the option of carrying the premier chain lock or the premier U-Lock. Both cost nearly $100, and the chain was more flexible solution. But it was a pain to carry. And it seem to take forever to lock to something. I used the U-Lock, which was no slouch in both weight and protective factor. It was very quick to lock the bike. The point of that diatribe is that convenience is one of the best parts of biking. I love trailers, but finding a place to park a bike attached with one is problematic at times. Your solution is efficient and elegant.


    14 years ago on Introduction

    Fantastic! I agree with rocknroll, please take on the project of a trailer. I would like to see what you would come up with. They are way too expensive to start with. I have found a kit to start with, but I can't decide where to take it from there.

    Good luck and great build.


    one more idea for even more stuff! make a trailer for her! i have two designs on here and they are awsome, but your basket i like more than my rack on my bike and its cool how it expands. but is there a way to do it without buying a brand new rack for scrap?