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Revelate Designs Mag-Tank — Specs & Analysis
Manufacturer specifications, compared against every other top tube & feed bags in our database. We do not test gear in the field — we measure, verify, and compare.
Revelate's current Mag-Tank, distinct from the older MagTank 2000 we also list. 0.5 liters, magnetic closure, and silicone mounting pads that stop it rotating on a round top tube.
There are two Mag-Tanks in circulation and it confuses everybody, so: the MagTank 2000 is the older, larger one at 1.4 liters, and it's still sold. This is the current Mag-Tank at 0.5 liters. Same magnetic closure idea, different bag.
The magnet is the feature. A zipped top tube bag needs two hands or a lot of faith to open at speed; a magnetic flap opens with a thumb and shuts itself when you let go. On a long day where you're eating on schedule rather than when you stop, that's not a gimmick.
The honest problem with this bag is the weight. 187g for 0.5 liters makes it one of the heaviest top tube bags per liter in our database — Apidura moves four times the volume for slightly more weight. What you're carrying is the magnet hardware, the semi-rigid structure that keeps the mouth open, and the silicone mounting pads.
Those pads are worth defending, though. Strap-mounted bags on round tubes rotate, and on washboard they do it fast. A high-friction pad between bag and tube is what a maker adds when they expect a strap alone to rotate.
At 22.9 x 11.4 x 7cm it's a normal-sized top tube bag by footprint. Revelate describes it as weatherproof welded storage rather than a fully sealed dry bag — a magnetic flap is not a waterproof closure and they don't claim it is.
$95, which is a lot for half a liter. You're paying for the closure and for a bag built in Anchorage.
Who Is the Revelate Designs Mag-Tank Best For?
Riders who want one-handed food access and will pay for the closure. If that describes your riding style, the Mag-Tank should be at the top of your shortlist. It sits in the Top Tube & Feed Bags category alongside 12 other products we track.
How It Compares
At 187g and $95, the Mag-Tank is 127g heavier than the lightest option in this category (the Blackburn Outpost Top Tube Bag at 60g). The most budget-friendly option is the Blackburn Outpost Top Tube Bag at $35.
The price-to-weight ratio comes in at $51 per 100g — a premium price point, but you're paying for quality, materials, and design that justify the investment for serious bikepackers.
What We Like
- +Magnetic closure opens and shuts one-handed at speed
- +Silicone pads stop it rotating on a round top tube
- +Made in Anchorage, Alaska
Watch Out For
- −187g for 0.5L is heavy for the volume
- −$95 is steep for half a liter
- −Weatherproof, not a sealed dry bag — a magnetic flap can't be
The Bottom Line
We haven't scored the Revelate Designs Mag-Tank, and neither has anyone else we can cite. It's here for its verified specifications and dimensions, which is what the fit tools run on — a score is an editorial judgement, and we don't hand one out until someone has a basis for it. What this page can tell you is measured: 187g, $95, and how both sit against every other top tube & feed bags product we track.
Weight checked against the manufacturer on 25 August 2026 — see the source. The price above has not.
Specifications and dimensions come from the sources listed above. Where a page draws on first-hand riding, it says so.
How it compares
Against the 13 top tube & feed bags we hold published specs for.
At 187g the Mag-Tank is lighter than 2 of 12 alternatives we track, which makes it among the heaviest we track. The category median is 115g.
At $95 it undercuts 2 of 12 of them, against a median of $69. That works out at $51 per 100g — below the $56 median for top tube & feed bags.
Weight and price come from published specifications. Cost per 100g is a blunt measure — it rewards light gear and says nothing about durability or whether the thing works — so treat it as one input, not a verdict.
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