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Mountain Frame Bag

$170 USD / $226 CAD

Surly Mountain Frame Bags are designed specifically to fit in the main triangle of your Surly frame. They’re handmade in the U.S. by Revelate Designs out of Dimension-Polyant VX21 polyurethane-coated fabric. They’re durable, rip resistant, tightly woven and laminated to be highly water resistant. Revelate advises using stuff sacks inside (such as those in which our bags are packaged) if you think you’ll be riding in extended downpours or underwater.

Our Mountain Frame Bags use a ladder strap system, which lets you customize the fit and placement of the mounting straps. So if you have some weird contraption clamped to your frame tubes like a chain keeper, cable pulley or some trinket grandma gave you, you know it won’t interfere with the mounting straps on the frame bag. Compartment access is controlled by quality YKK brand water-resistant zippers.

The large main compartment has a flexible divider inside, and there’s a hidden pocket too. There’s also a compartment suitable for smaller items you’ll access relatively often, like your map, phone, hard-boiled eggs, uncontained pudding, marbles for playing marbles, your dugout, that ring you found that makes you disappear when you put it on, or what have you.

NOTE: due to the rough texture of the mounting straps, prolonged use may lead to scratched or worn paint. Those worried about keeping their frame looking pristine should immediately look for some other type of bag, or figure a way to protect their paint, such as duct tape, or tatting a top tube doily – for example.


SKU Waterproof Color Weight Number of Compartments Primary Material Size
BG5840 Surly Frame Bag 6 for Karate Monkey, Ogre, Troll, 1x1, Krampus BG5840 No Black 431 g 2 Dimension Polyant VX Bag 6
BG5841 Surly Frame Bag 7 for Karate Monkey, Ogre, Troll, 1x1, Krampus BG5841 No Black 431 g 2 Dimension Polyant VX Bag 7
BG5842 Surly Frame Bag 8 for Karate Monkey, Ogre, Troll, 1x1, Krampus BG5842 No Black 431 g 2 Dimension Polyant VX Bag 8
BG5843 Surly Frame Bag 9 for Karate Monkey, Ogre, Troll, 1x1, Krampus BG5843 No Black 431 g 2 Dimension Polyant VX Bag 9
BG5844 Surly Frame Bag 10 for Karate Monkey, Ogre, Troll, 1x1, Krampus BG5844 No Black 431 g 2 Dimension Polyant VX Bag 10


Mountain Frame Bag

Mountain Frame Bag with measurements for (A) Seat tube inner, (B) Top tube inner, (C) Down tube inner, (D) Seat tube area width

Bag Size

6 7 8 9 10
Seat Tube Inner 8.0 203 9.0 229 10.5 267 13.0 330 14.8 375
Top Tube Inner 16.8 425 18.5 470 20.5 521 21.5 546 22.8 578
Down Tube Inner 19.5 495 20.5 521 22.0 559 23.5 597 25.0 635
Seat Tube Area Width 2.0 51 2.0 51 2.0 51 2.0 51 2.0 51
Model Fit Frame Size
1x1 A 6 7 8 9 10
Big Dummy A 7 8 9 10
B 6 7 8 9
Big Fat Dummy A 6 8 10
Bridge Club A 6 7 8 9 10
B 7 8 9 10
ECR A 6 7 8 9
B 6 7 8 9 10
Ice Cream Truck A
B 6 7 8 9
Karate Monkey A 6 7 8 9
B 6 7 8 9 10
Krampus A 6 7 8 9
B 7 8 9 10
Lowside A 8 9 10
B 6 6 7 8 9
Ogre A 6 6 7 8 9
B 6 7 8 9 10
Pugsley A 6 7 8 9 10
B 7 8 9 10
Troll A 6 7 8 9 10
B 7 8 9 10
Wednesday A 7 8 9
B 6 6 8 9 10

#42-64 = Bag Size
A = Best Fit, Like Custom
B = Good Fit, But Not Quite Like Custom

Find More Surly Bags

More info on sizing

FAQ & Reviews



Component Warranty


This Surly product is warranted against defects in materials and workmanship for one year from the date of retail purchase of the product, subject to the limitations detailed below. Save your dated receipt for proof of purchase.

This warranty does NOT cover the following:

  • Damage due to improper assembly or follow-up maintenance or lack of skill, competence or experience of the user or assembler
  • Products that have been modified, neglected, used in competition or for commercial purposes, misused or abused, involved in accidents or anything other than normal use
  • Installation of components, parts or accessories not originally intended for or compatible with bicycle as sold
  • Damage or deterioration to the paint, surface finish, aesthetics or appearance of the product
  • Normal wear and tear
  • Labor required to remove and/or refit and re-adjust the product within the bicycle assembly

This limited warranty is expressly limited to the repair or replacement of a defective product, at the option of Surly, and is the sole remedy of the warranty. This limited warranty applies only to the original purchaser of the Surly product and is not transferrable. This warranty applies only to products purchased through an authorized dealer or distributor. In no event shall Surly be liable for any loss, inconvenience or damage, whether direct, incidental, consequential, or otherwise resulting from breach of any express or implied warranty or condition, of merchantability, fitness for a particular purpose, or otherwise with respect to our products except as set forth herein.

This limited warranty gives the consumer specific legal rights, and those rights and other rights may vary from place to place. This limited warranty does not affect your statutory rights.