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  • Mercury Wheels - G3 650b Gravel Wheelset - Tubeless - Black
  • Mercury Wheels - Rear -

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  • Mercury Wheels - G3 650b Gravel Wheelset - Tubeless - Black

Mercury Wheels G3 650b Gravel Wheelset - Tubeless

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sale $349.95 $799.00

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    • Black, 15x100/12x142mm, Shimano/SRAM HG
      sale $349.95

    7 Reviews


    Gravel ready.

    People's definition of gravel riding can waver whether that's based on personal preference, bike setup, or simply the terrain available depending on where you live. The general consensus for riding "real" gravel, think loose and chunky, is wider is better when it comes to tire size as it allows for better flat prevention, more traction, and overall better comfort. But gravel bikes have a limitation on how wide a 700c tire you can fit in the frame and fork and in an effort to get higher volume tires to fit into these framesets, the gravel crowd looked at what the mountain bike world did when putting fatter 27.5-inch wheels and tires on their 29-inch setups. Road plus is no longer a fringe segment of the market and now frame builders, as well as wheel and tire manufactures, are on board and if your bike supports plus and you're looking to add a little more volume to your ride, we'd suggest you have a look at the Tubeless G3 650b Gravel Wheelset from Mercury Wheels for a solid setup. The price is just right too so you can keep the 700c wheels for fast road rides and save these wheels for the gravel. 

    The hookless aluminum rims come in at a 30mm external and 25mm internal width for optimal gravel tire support and an easy tubeless setup. It's 22mm deep profile balances stiffness, for a responsive ride, and compliance, for a little more forgiveness over washboards and ruts and the rims are laser welded for lightweight strength. The build quality is top notch and is hand built in Mercury's Ogden, UT facility to exacting standards. Sapim double butted spokes and alloy nipples keep weight to a minimum and reliability to a maximum and connect the rims to the Mercury hubs with reliable sealed cartridge bearings. This setup comes with a 15 x 100mm front and 12 x 142mm rear thru-axle spacing but it can easily convert to quick-release if needed. 

    The set comes in at a respectable 1,644g which is only around 100g heavier than full carbon XC options and a lot friendlier on the wallet. Rim tape and valves are included for tubeless use. Please choose between Shimano/SRAM or XD freehubs for your drivetrain and note that the rotor mounting is for 6-bolt.

    • A gravel wheelset that adds volume for traction and comfort
    • Rim width optimized for gravel-sized tires
    • 15x100 and 12x142mm thru-axles reduce torsional flex
    • Tubeless setup is easy with the included tape and valves
    • 650b+ allows for higher volume tires to fit in 700c frames
    • Item #MCW0014

    Tech Specs

    Rim Material
    Wheel Size
    Tire Type
    Rim Depth
    Rim Width
    [external] 30mm, [internal] 25mm
    Brake Compatibility
    6-bolt disc
    Front Axle
    15mm Thru-Axle
    Rear Axle
    12 x 142mm Thru-Axle
    Sapim double butted
    Spoke Nipple
    Spoke Count
    [front and rear] 28
    Claimed Weight
    Recommended Use
    Manufacturer Warranty
    2 years

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

    Have questions about this product?

    Two Thumbs Up

    • Familiarity: I've put it through the wringer

    I will say that I was a little bummed with the BB dropping after installing the smaller wheels and larger tires. It wasn't a drastic drop but I was already tagging my cranks more than I'd like. Just have to mellow out and coast a bit... ah well.
    I have really been liking everything else about them though! I don't race and I'm after a PR everytime I go out. So the extra rubber has just kept a fat smile on my face while riding some of my favorite trails close to home. Handling of the bike has improved and I feel far faster when the trail gets rough.
    I will hold onto the stock wheels for long distance road rides but aside from that I don't think I'll be going back to the 700c.
    Mercury has made a quality set of wheels and I couldn't be happier while riding.

    Good Buy

    • Familiarity: I've put it through the wringer

    No complaints on the wheels. Swapping over the correct end caps was simple and the parts were only $25.
    Coming up on 1000 miles and they have remained silent and smooth through all the dirty rides.

    Unbeatable Price

    • Familiarity: I've put it through the wringer

    Great upgrade for my gravel bike. Wanted to test the ride out with some extra squish and I was glad I did. Lot of single track riding and I was I was tired of dinging up my rims with the 700 x 38c tires, all the pings down rocky sections can be nerve racking. Now that I can fit a 650 50c, I'm floating over with confidence.
    I've hammered these wheels and they stayed as true as can be. Would highly recommend.


      If you have one of those new gen gravel bikes that can fit both 700c and 650b wheels, and are interested in trying 650b without breaking the bank, you should check these wheels out. Pretty decently light, set up tubeless super easy, and they have a generous interior width to work perfectly with something like a 47mm tire or wider.

      XC Ready

      • Familiarity: I've used it several times

      I picked up this set for XC use on a hard tail MTB, much lighter than the stock set and I'm rolling much faster. For the price I was really surprised with how much they've improved my ride. They've been great.

      This is what I have been waiting for

      • Familiarity: I've used it several times

      Finally a nice set of 650b alloy wheels that fit perfectly on my Giant Tough Road. been on a few weekend trips with them and am looking forward to my week long trek.

      Unanswered Question

      Can these be converted to 12mm thru axle front? I have a set of Mercury G1’s with 12mm & 15mm endcaps. Wondering if they are interchangeable? Thanks

      Unanswered Question

      Will these wheels work on my specialized Tarmac road frame? Brake surface alignment OK?
      Thank you