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The Bilt Expander Tank Bag has been discontinued and will not be returning.

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Bilt Expander Tank Bag

When you need a bit more space than the BiLT Mini Tank Bag can provide. Bring everything you need on your next ride.


  • Clear zip entry map pocket
  • Multi-magnet base securing system
  • Protective rubberized grip base
  • Spiral expansion zip allows for additional capacity
  • Inner mesh organizer pocket
  • Webbed carry handle
  • Dimensions: 12.5" L x 8" W x 5" H
  • Expands to: 12.5" L x 8" W x 8" H
  • Cycle Gear exclusive
4.4 / 5.0
43 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Bang for the Buck
5.0 / 5
Would Purchase Again
4.7 / 5
Ease of Install
5.0 / 5
4.3 / 5
Ease of Use
5.0 / 5
Quality of Material
4.3 / 5
Would you recommend?
Yes (3)
great bag for price!
great bag looks small when on tank but expands to fit almost any drive thru order your wife can throw at you.. minus the large coke... great price. even at full price i was willing to buy, but ended up being on sale for [$], thumbs up to that!! iphone still works thru the map top with bare finger or stylus with gloves.. overall a great little/big bag for the price. only downfall is the velcro strap to hold magnet flaps closed has no place to go when the bag is on the tank, i just try and tuck under bag seems to work, thinking about cutting it off. and styling... oh well, function over form this time i guess..

PROS: Great price, Expandable, Clear map top, Small Size

CONS: Velcro strap, Wish it was all black

March 25, 2012
Tank bag is ok
I ride an old cruiser, and it has been hard to find a place where i could try the bag on for fit. Cycle gear was the place that allowed me to do this. Because of the placement of my tank emblems, it was hard finding one that i felt comfortable with the magnets holding. This bag fit the bill. The unfortunate part is that it should be used in dry weather only, and living in the NW limits the use.

PROS: Fit, Magnets Size

CONS: Not water resistant

October 13, 2012
Great tank bag. The expanding feature is handy. It allows me to keep the bag small but can hold alot of stuff when I need it to. It also works as a tail bag on my luggage rack. The magnetic straps wrap perfectly around the inner rails on my rack and there's a Velcro strap on the bottom that allows me to secure the bag. Great buy on sale!
September 20, 2011
Good quality, but smaller than expected
Delivery was amazingly fast - 1 day! (granted, I'm in the Bay Area, as is Cycle Gear's DC).
The box and product were in perfect condition.
I returned it to a local store with no issues whatsoever, and good assistance researching alternatives.
I will continue to shop with Cycle Gear.

PROS: Expandable, Magnetic base

CONS: Not That Large

January 27, 2014
My first and I'm happy I bought it
This was my first tank bag that I bought for my 400 mile trip from nor-cal to so-cal. Like it says, it's expandable with the zipper undone. It's a lot roomier than I thought and I managed to fit 4 pairs of my shoes in there: two pairs of Vans, some running shoes and my soccer shoes. It has the map view but you have to fold the paper to make it fit in there. I didn't really have a use for it but I put a map and directions in there anyways. It's not really stylish as it looks like an old school lunch box with only a handle to carry it around in. But the bag stayed on just fine going 80+mph. I am definitely happy I bought this bag for my trip.

PROS: price

September 10, 2011
Nice Bag/Great Price
It would fit rain gear and insulated jacket liner, but not much else. Big enough to fit any other not-too-bulky necessity. When expanded and packed full, it isn't in the way. I ended up buying a tail bag for bulky items. I couldn't find a smaller bag for the price anywhere, so I kept this one. All other bags were smaller and twice the price. My smartphone works through the map pocket. Would be nice if there was a separate pocket or 2 inside.

PROS: Strong Magnets, Sturdy Construction, Not too big, Expandable

CONS: No separate pocket inside

July 29, 2012
Very useful!
I have to say this is one of the most useful things I have bought for my motorcycle. Fill it with whatever and stick it on.

On and off is incredibly easy. I just pop it off and carry it with me into a store or rest stop or anywhere else.

I wish it was waterproof since I usually put my phone or gps in there (and it ALWAYS rains in Florida). It could also be a bit bigger since an 8.5x11 paper will not fit in the map pocket.

PROS: Big, Quick, Magnetic, Sale

CONS: Not waterproof

BEST USES: Around town, traveling
September 15, 2012
Magnets really make this bag top notch
I use this bag for shorter rides, when I don't want to leave my bigger bag on my bike or carry my stuff around. This bag hooks right on my gas tank with magnets and it has nice handle to take the bag with me. It does expand so I can do some shopping if needed! It was a really excellent price too!! Now if my dog fit in it, it would be perfect! :)

PROS: Bike Bag Is A Great Size

CONS: None for the price

October 13, 2012
This Bag is Sweet
This bag is definitely worth the purchase. I'm really pleased that it has plenty of space needed to carry my things to work. I no longer have to bring my back pack of short rides, and I have extra space on long drives.

I would buy this bag on sale, but I wouldn't pay the full manufacturer's retail price on it. But other than that, it's a great buy.

PROS: Useful, Convenient

CONS: Non-waterproof

BEST USES: Rain Gear, Commuting, Travel
August 21, 2013
Great product
I love it, it's like having a glove box on a bike. Great for trips or just riding.
August 21, 2013
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Product Style Item # Manufacturer Product # Availability
Black/Grey 1131062 BLLG2-BG Out of Stock