Release 4C Carbon

star(s) from 10 reviews.

Availability: Out of stock

How do you improve on a hit bike? You make it carbon.
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Release 4C Carbon

Several cycling magazines and websites called last season’s Release the best trail bike Diamondback has ever made. We were humbled. And challenged. How do you top that? By taking the same cutting-edge 130mm travel suspension design and progressive geometry and crafting a new frame entirely out of carbon fiber. We’re proud to unveil the Release 4 C — a bike with the same bottomless-feeling rear suspension and deft handling as its predecessor, but with an even lighter and stiffer chassis.

We equipped the Release 4 C with a Fox Float DPS EVOL LV rear shock and a150mm travel Fox 34 Performance Float fork for smooth bump-eating performance. Likewise, Shimano’s SLX 11-speed single-ring drivetrain provides consistent shifting and, thanks to its generous 46-tooth granny gear, makes short work of the kind of climbs you’d normally despise.

Frame Carbon Release 27.5, Monocoque Carbon Front and Rear Triangle, 130mm Travel, Level Link Suspension Platform, Euro Standard Threaded BB, ISCG-05 Tabs, Boost 148x12mm Maxle Drop Out, 1.5" Tapered Headtube, Post Mount Disc Tabs
Rear Shock Fox Float DPS EVOL LV, Performance, 3 Position Lever, 200x57mm
Fork Fox 34 Performance Float, 27.5", 150mm Travel, Grip 3 Position Dampener, Rebound Adjust, 1.5" Tapered Steerer, 110x15mm Thru-axle
Headset FSA No. 57 Sealed Cartridge
Cranks Raceface Æffect Cinch w/ Steel 30T "Narrow Wide"
Bottom Bracket Raceface Outboard Bearing
Rear Derailleur Shimano SLX M7000, Shadow Plus, 11 Speed
Shifter Shimano SLX M7000, 11 Speed
Cogset Shimano SLX M7000, 11 Speed, 11-46T
Chain KMC X11EL, 11 Speed
Front Hub 32h Alloy, Boost 110x15mm Thru-axle, Sealed Cartridge Bearing
Rear Hub 32h Alloy, Boost 148x12mm Thru-axle, 5 Sealed Cartridge Bearing, Cassette
Spokes 14g Stainless Steel
Rims Diamondback Blanchard 28R, Tubeless Compatible, 32h
Tires Maxxis Minion DHF 27.5x2.3" EXO, TLR, Folding / Maxxis Minion DHR 27.5x2.3" EXO, TLR, Folding
Brakes Shimano Deore M6000 Hydraulic Disc, w/ 180mm Front / 180mm Rear RT-66 Rotors
Brake Levers Shimano Deore M6000
Pedals DB4L Alloy Platform w/ Replaceable Pins
Handlebar DB35 Alloy, 780mm Wide, 15mm Rise, 35mm Bar Bore
Grips Ergon GE10 Lock-On
Stem DB35 Alloy, 40mm Reach, 35mm Bar Bore
Seat WTB Volt Race
Seatpost KS LEV SI Internal Dropper, w/ SouthPaw Remote, 31.6mm, SM/MD = 125mm, LG/XL = 150mm
Extras Owner’s Manual, Assembly Guide, DB Shock Pump, Tubless Valves, DB Torque Wrench w/ 3mm/ 4mm/ 5mm/ T25 Hex Bits, Diamondback Mud Guard, Extra Derailleur Hanger
Bike Size SM/15.5" / Rider Height: 5'4" - 5'7" MD/17" / Rider Height: 5'7" - 5'10" LG/19" / Rider Height: 5'10" - 6'2" XL/21" / Rider Height: 6'2"-6'6"
Seat Tube Length 394.0mm 432.0mm 483.0mm 533.0mm
Stand Over Height 739.0mm 740.0mm 743.0mm 749.0mm
Top Tube Length 585.0mm 610.0mm 635.0mm 660.0mm
Stack 584.0mm 597.0mm 603.0mm 612.0mm
Reach 406.0mm 429.0mm 451.0mm 473.0mm
Head Tube Length 100.0mm 110.0mm 120.0mm 130.0mm
Head Angle 66.0° 66.0° 66.0° 66.0°
Seat Angle 73.0° 73.0° 73.0° 73.0°
Wheel Base 1133.0mm 1160.0mm 1186.0mm 1213.0mm
Chain Stay Length 425.0mm 425.0mm 425.0mm 425.0mm
Fork Offset 44.0mm 44.0mm 44.0mm 44.0mm
BB Drop 14.0mm 14.0mm 14.0mm 14.0mm
Stem Length 40.0mm 40.0mm 40.0mm 40.0mm
Handlebar Width 780.0mm 780.0mm 780.0mm 780.0mm
Crank Length 170.0mm 175.0mm 175.0mm 175.0mm
Seat Post Length 350.0mm 350.0mm 350.0mm 350.0mm

Customer Reviews Write Your Own

You're reviewing: Release 4C Carbon

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Overall Quality

great bike

Review by jay
Overall Quality

been riding this bike all summer and am very happy with it. It does have some issues, like how low the pedals are and the lockout switch for the rear shock gets flicked too easy. But it's a very good bike overall.

(Posted on 9/19/2018)

Love this bike!

Review by Cabsnow
Overall Quality

I instantly fell in love when I first rode this bike. It's fast, it's steady and it flys. My old bike was holding me back and I can't believe it. I got the 4 over the 5 strictly due to color, then I upgraded the bars, stem, rear shock and pedals. All for less than the 5c. YOU CAN'T GO WRONG WITH THIS BIKE.

(Posted on 7/10/2018)

Mind = blown.

Review by Ken
Overall Quality

Easily the best single gear purchase I've ever made. I've been thrashing a 4" Kona that was super legit for its day...but that day was ten years ago. So, take what I say with a grain of salt because this is my first bike with a dropper post, 27.5s, through axle, and/or carbon frame. That said, I've never before purchased any other single piece of equipment that instantly made me able to do things I couldn't do before. My two best riding buddies are on a Transition and a Santa Cruz (read: their bikes cost more than twice as much as mine) and I was hanging with them just fine at the Trailside bike park outside of Park City, UT.

I can't really speak to how this bike compares in terms of technical specs but it's hard to believe there's a better value out there. Last time I spent big money on a bike you basically had to choose between a XC race rig or a DH monster made for the North Shore. This thing feels like a bike "for the rest of us" - affordable, confidence-inspiring on varied terrain, and just a whole hell of a lot of fun to ride.

(Posted on 5/16/2018)


Review by TEO
Overall Quality

I just received ,my bike from Aventuron, & the assembly was extremely easy!
It was the first time I had set up a dropper post, and I cannot believe that I had never had before!
Very efficient.. Anyways, I have ridden the bike twice at my local trail (Rowlett Creek Nature Preserve) & it has been flawless thus far.

I was coming from a Santa Cruz 5010, but that being said it was my first time riding since 2015.
At first I was skeptical, because we have seen DB at walmart, so after that you think that the brands value has been lost... Which was my
initial though, until I rode one. Everything I thought I knew about the brand went out the window.

My only problem, which is not the bikes fault, is that I keep on doing pedal scrapes.
Now that being said, I am about 230lbs.... So, my assumption is the weight. I also need to play around with the suspension as well.

Other than that, the bike is soooo good!

(Posted on 5/11/2018)

Fantastic bike

Review by Matt
Overall Quality

The bike I've been riding before upgrading to the 4c was a mid 90's Gary Fisher Aquila. That's a hard tail. So obviously this is a huge leap forward for me. I have do not have any experience with full suspension bikes, so I cannot give a comparison on this vs a more expensive bike. But what I will say is that I climb almost as good as my hard tail and I leave the rear shock in open mode. I have never even messed with the setting on the shock, I've only set the sag. I see other riders bouncing when they are cranking uphill, but not me. It feels great to ride, I'm proud to own it, and I'm looking forward to buying diamondbacks for my family now. Great product, without breaking the budget.

(Posted on 5/8/2018)

Amazing bike

Review by Brent
Overall Quality

I purchased my 4C in early March I wasn’t able to ride until late April but the horrible wait was worth it because this bike is absolutely amazing. It is very quick, very responsive and loves the big hits. I’ll be honest I was kind of afraid of the name at first, but Diamondback got it right with the Release. This bike is amazing, I would compare it to a Cube HPA 160 or a YT Capra, a lot of bang for your buck. This bikes awesome and I could not be happier with this purchase. Diamondback is cool again!

(Posted on 5/5/2018)

A great upgrade

Review by Jim
Overall Quality

My last bike was a 29” DB Overdrive 29er. It was well spec’d and a great price, so picked it up at Sports Authority. I beat the crap out of that bike and it was time for an upgrade. Initially I hadn’t planned to get another DB. I thought of them as more as of a big box retailer bike and I wanted to get a boutique bike. After researching for months (I know... it sounds pathetic, but ehh) I found that the Release has similar components to the boutique bikes, but a much better price. Add to that a carbon frame and I’m riding my dream bike without crying when the credit card statement comes.

I am 6’2” and was torn between the Large and the XL. A few more hours of research and I found out that Eric Porter, a DB sponsored rider, rides a large. If he does it, I figure that I will too and I’ll be just as good as he is (kidding).

I bought the 4C. It has been great. Hydraulic brakes are cool. My Overdrive was old and didn’t even have disc brakes. The Level Link is amazing. Very little bob while pushing the pedals and super plush. I share the same dropper post feelings as the other reviewers. I am amazed at how easy the bike is to pedal. In fact, I might go to 34 teeth on the front ring. I will make decision after tackling some serious elevation gain. Finally, I feel more confident on this bike. Therefore I am trying more difficult challenges and I am improving. I am very happy with the Release 4C.

(Posted on 4/28/2018)

Solid Trail Bike

Review by ColoradoRider
Overall Quality

I now have about 250 miles on my release, so I felt like I could finally leave a decent review.

Overall this is a great package. It climbs well, descends well, and is a good price. I’ve been a shimano and fox fan for a long time, so this build was what I was looking for. I would have preferred XT for the shifter and rear derailleur, but once again, it’s hard to argue with the price.

The elephant in the room seems to be weight and quality, so I’ll start there. I’ve seen a lot of misinformation about weight. Primarily people saying the R3 is lighter. Without pedals my large 4C was 30.7lbs, after tubeless conversion it was 30.2lbs. Not light, but I don’t notice the weight while riding. The efficient linkage definitely seems to help. I don’t feel like I gave up much of any climbing ability over my last bike, which was more XC focused, but 8 years old. It handles itself well on 25+ Mile days as well. I’m looking forward to pushing myself closer to the 50 mile mark this season. My usual rides are ~20 miles with 3000+ feet of climbing.

The quality on my bike has been great. No dings or marks I’ve seen on other deliveries. My wheels are still true, drivetrain only needed slight adjustment. Since then I have on paint chip on the rear triangle due to a crash caused by rider error. It actually appears to be over a little bit of metal for the rear thru axle. I think this would have happened on any bike. So durability seems fine to me.

Since purchasing this bike, I’ve grown a lot more comfortable on the descents. It took me a while to get used to the bike and I kept washing out the front wheel on flow sections. After getting used to the new geometry, I’m faster and more in control. I’m now way more confident than before.

I’m not the most aggressive rider, so the DPS/34 combo has been awesome for me. I don’t notice any flex in the fork and it feels great at the recommended rebound from fox. The shock took me longer to get set right, but now it feels great. I don’t notice any fade on long descents, which is why I think the 5C was overkill for my riding and I prefer the lower weight.

It rides great, looks great, and is a whole lot of fun that you can ride anywhere. It’s a great trail bike that punches above its price tag. And on that not, I’m not just stoked on the bike for the price, I’m really just stoked on the bike. It’s going to stay my go to bike for a long time to come.

(Posted on 4/23/2018)

Great ride - great value

Review by Pete
Overall Quality

I got my 4C after riding a bunch of high-end carbon bikes. The price was great given the component spec, but my first ride was off the charts amazing. Climbed up a very steep technical switch back with great balance and I was able to rip (relative to my past rides) down with confidence. I could not bee more happy with my purchase and everyone on the trail wants to know what I'm riding. Diamondback is back!

(Posted on 2/22/2018)

Amazing performance and aesthetics @ and even more amazing price point.

Review by dirtdiggler
Overall Quality

This was easily the best bike purchase I ever made. You get a beautifully designed full carbon frameset in a lovely color scheme with wide 32 spoke wheels and long travel suspension that just gobbles up all the trail comfortably and inspires confidence during aggressive downhill riding. I loved how the bike looked in the pictures but the picture do it no justice. Once you see this bike in person it is such a beautiful bike with perfectly profiled tube shapes and in my opinion the perfect color scheme. The drivetrain components perform well and shift perfectly when setup correctly. The wide 32 spoke wheels are a huge plus. The fox suspension is adjustable and performs beyond expectation @ this price point. Dropper post works great. Gearing accomodates all types of riding but I found a couple more teeth on the front chainring to help gain some more speed on the flats and not spin out so soon on the steep downhills. Definately best bang for the buck MTB package out there. So many great features @ such a great price point which really makes this the best bike purchase i've ever made. I keep putting emphasis on the price point because very few, if at all any, bike companies are selling a master crafted full carbon mtb for under $4k. So with that being said, Thanks Diamondback. :) :) :) :)

(Posted on 11/24/2017)


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