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Mr. Fusion Seat Pack

(1 customer review)

$230.00

Large capacity waterproof seat pack system. Complete with integrated mini-rack and large-volume, removable drybag.

Mr. Fusion is our modular waterproof seat pack, centered around a svelte mini-rack, holster, and a dedicated seat post clamp. 100% waterproof, and with the snap of one buckle, it’s insanely easy to load & unload.  Pack your things off the bike, and never worry about wiggle, wobble, or sag. You may use either a 12L max capacity drybag, or a 15L max capacity drybag in the same holster, depending on the trip and necessary volume requirements. The 15L is an EXTRA LARGE bag please check the clearance measurements to make sure it will fit. For reference it's more than double our sewn Foxglove Saddlebag.

BEFORE ORDERING, PLEASE READ THE FAQ TAB!

Standard Features Include:

  • 560g complete (including drybag, rack, seatpost clamp, and all hardware)
  • 4130 Chromoly mini-rack (built by Hunter Cycles in California, USA)
  • Waterproof proprietary RF-welded 210D PU-coated nylon drybag included, in our signature DarkWhite™ color
  • PU-coated 420D fabric in our signature LightBlack™ color
  • HDPE Stiffened side panels to avoid thigh rub
  • Bartacked at all critical stress points
  • Duraflex™ acetyl buckles throughout
  • CNC’d 6061 aluminum seatpost clamps
  • Full stainless steel rack attachment hardware included
  • Full Hypalon lower holster section
  • Double-back main seatpost attachment
  • Convenient, integrated dangle points
  • Handmade in Calgary, Alberta Canada

 

Clearance Requirements

  • Mr. Fusion with 8-12L drybag requires 8″ between seat rails and tire (when rear suspension is fully compressed on FS bikes), and 4.5″ of exposed seatpost.
  • Mr. Fusion with 10-15L drybag requires 9.5″ between seat rails and tire (when rear suspension is fully compressed on FS bikes), and 5.5″ of exposed seatpost. This is a BIG seatpack.

♦ NOT recommended for carbon seat posts, suspension seat posts, or dropper posts ♦

Additional information

Weight 17 oz
Weight

19.7 ounces (560 grams). Exact weight depends on features selected.

Volume

8-12 Liters for the Large dry bag.
10-15 Liters for the XL dry bag.

Compatibility

Large dry bag requires 4.5" of exposed seat post and 8″ of clearance between the saddle rails, and the tire at its closest point to the saddle.

XL requires 5.5" of exposed seat post and 9.5″ of clearance between the saddle rails, and the tire at its closest point to the saddle.

Not compatible with carbon posts, suspension posts, or dropper posts. Please see FAQ tab for explanation.

FAQ

Q : How do I know what size seatpost clamp to choose with my order?

A : Mr. Fusion mounts directly to the seatpost of your bicycle, not to the bicycle frame itself.  So, you will want to choose the clamp size that is the same diameter as the seatpost that your bicycle uses.  Often, if you remove the seatpost from the bicycle frame, the seatpost size will be stamped or etched into the seatpost, near the base.  If your seatpost reads something like “27.2mm x 400mm”, this means your seatpost is 27.2mm in diameter, and 400mm in length.  You would want to choose a 27.2 clamp for your Mr. Fusion order in this scenario.
Q : Is Mr. Fusion compatible with a dropper post?
A : No.
Q : Why is Mr. Fusion not recommended for carbon seatposts?
A : Some folks tend to get a bit ham-fisted when tightening bolts on their bicycles, and Rockgeist cannot be held responsible for damage to expensive carbon seatposts, due to over-torquing of the clamp bolt.  The clamp bolt is meant to be tightened to NO MORE than 4Nm.  This is about the same torque that you would apply to MTB brake levers; tight enough to hold the stabilizing rack in place reliably, but not so tight that the rack cannot rotate on the seatpost, in the event of a crash. If you do decide to install Mr. Fusion on a carbon seatpost, this is done at your own risk.
Q : Is Mr. Fusion compatible with a suspension seatpost?
A : No.

Q : Can I use both drybag sizes in the same Mr. Fusion holster?

A : Yes!  Mr. Fusion uses the same holster for both drybag sizes.
Q : How do I know if I have the required clearance and exposed seatpost for Mr. Fusion with a 12L drybag?
A : For Mr. Fusion with 12L drybag, you will need 8″ of clearance between the saddle rails, and the tire at it’s closest point to the saddle.  You will need 4.5″ of exposed seatpost (measured from the saddle rails to the top of the seatpost collar on the bicycle frame.  Keep in mind that if you ride a full suspension bike, these measurements need to be taken when the suspension is fully compressed.
Q : How do I know if I have the required clearance and exposed seatpost for Mr. Fusion with a 15L drybag?
A : For Mr. Fusion with 15L drybag, you will need 9.5″ of clearance between the saddle rails, and the tire at it’s closest point to the saddle.  You will need 5.5″ of exposed seatpost (measured from the saddle rails to the top of the seatpost collar on the bicycle frame.  This is a BIG seatpack!  Keep in mind that if you ride a full suspension bike, these measurements need to be taken when the suspension is fully compressed.
Q : My Mr. Fusion drybag has developed a hole.  How should I repair it?
A : Most common outdoor gear repair kits, designed for PU-coated fabrics, will work well on the Mr. Fusion drybag. Tenacious Tape, or similar gear repair tape, is also a good option for field repairs.  If you would like us to professionally repair your Mr. Fusion drybag with a welded-on patch, please email [email protected]

Instructions

1 review for Mr. Fusion Seat Pack

  1. Sepie Moinipanah (verified owner)

    My partner and I recently bought a pair of Mr. Fusion Seat Packs for our bikepacking trips this summer. To kick things off, we set these up on our bikes (actually shown above in one of the pictures!) and rode about 50 miles in each direction on mostly paved roads, with some gravel thrown into the mix. We were very pleased as to how well they secured our belongings and after a while, we barely noticed that they were there. The weight distribution is key but the part that really blew us away was the lack of swaying we felt, especially while cornering.

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