The Most Unique BMX Frame Dropout List

What do you think of our integrated chain tensioning system? Complete with dials, and set screws. We think they're

Syndyt frames come equipped with integrated chain tensioners for easy and precise adjustments, eliminating the hassle of traditional setups. The flexibility of multi-size rear axle choices allows riders to customize their BMX for various tracks and riding styles, putting control firmly in your hands.

~Syndyt

• Oversized Adjustable 20mm Dropout (10mm/15mm Compatible)
• 50mm of fore-and-aft rear axle adjustment
• Internal rear brake cable routing
• Disc Brake Post Mount Attached to Dropout Adapter

~Race Inc

CNC 3D Dropouts with Built in Chain Tensioners and Disc Hanger

~Rift

Experience the ARC’s vertical sliding drop-outs on the track and in your workshop and you’ll never go back to a horizontal slot rear drop-out. Other frames responded with fixed rear axles and idler spring arms to solve disc brake mount, axle creep and drive-train alignment issues, but even those with some wheel base adjustment simply don’t give you much compared to the width of our large “drop-slot”  — without the dangling idler and the excess chain. Our integrated disc caliper mount, stainless (or optional titanium) chain ring style slider bolts and “drop-saver” frame washers, and integrated titanium 4mm tensioner screws make the ARC the most precise in BMX for achieving perfect chain alignment/tension and the easiest to remove and reinstall a rear wheel with no readjustment necessary.

~Daylight Cycles

Changing gearing, whether it's during training, or to give you an advantage at a certain track, is incredibly important. Moving your wheel & adjusting your chain length to adapt to those gearing however, is not good. 

Meybo solves the problem with a fixed rear wheel and a unique chain tensioner system to give you a smooth chain with proper tension no matter what.

~Meybo

• Full captive, solid carbon rear dropout featuring the Supercross BMX Flip/Chip

• Built-in chain idler/guide

~Supercross BMX

Disc brake directly mounted on the frame, Meybo solid chainstay with fixed 15mm rear drop outs, Ensure you always the same Chainstay length whatever gear you run! Easy, fast and straight mounting of your rear wheel! Meybo chain tensioner system.

~Meybo

• Maximum integration of the rear disc caliper on the frame using a “Post mount” type attachment to mount a 120mm disc
• A perfectly integrated chain tensioner system

~Prophecy

AL CNC/Forged Quick Change Disc Dropout System

~GT

Tim Drew gave me the heads up on this 2024 Stay Strong V5 dropout and I gotta say this is one of my favorite. I wish there was a high rez photo but you get the idea. It's another enclosed dropout with integrated chain tensioners. It also looks like it must have propietary disc brake mounting system. Im digging the embossed "RACE DVSN" and the 5 slot cut outs for weight saving and extra style points. I wonder what the rest of the frame looks like.

4nix Atome: "DROPOUT" REAR BASES: The rear legs offer you a better setting possibilities. Frames are choice with 2 legs in axel  10m.

The entire drop out area is specifically designed to accommodate a disc and all the necessary adjustments with an unapologetic, high tech.

~Fifteen

Commencal BMX P038: The state-of-the-art dropouts are machined and offers an option of the wheel position change. Thanks to the dropout integrated FlipFlop the chainstay length (392mm in mid position) might be adjusted by 8mm in total. (-4mm, 0, +4mm). To make things user-friendly the flatmount brake adapter position is indexed to the FlipFlop position making the brake set up extremely precise.

Our flat mount design attaches the brake caliper to the inner axle block and internally routes the brake hose through the inside chainstay. It slides with the wheel and fastens to the frame with a 4mm screw on the outside of the chainstay. Axle compatibility is 10mm, 15mm or 20mm and rotor compatibility is 140mm.

The drive side is offset at the dropout to accommodate our internal chain tensioner while the seatstay has been raised to eliminate chain slap when running taller gear ratios.

~Speedco

This is the I Am Cook BMX racing frame rear dropout. It's a unique enclosed dropout especially for a 4130 Chromoly frame.

I Am Cook 4130 disc brake dropout

Brian Cole put me on to this 2023 Throdwn. I couldn't find any details about the dropouts but you can see from the pic they're enclosed. They most likely come with 10mm, 15mm and 30mm adaptors and it has integrated chain tensioners. Leave a comment below if you know more details about this one.

"The innovative two-position Flip Chip geometry adjustment allows riders to customize their riding experience. With 8mm of top tube and rear stay adjustment, riders can fine-tune the frame to their desired preferences. CNC machined with the highest precision for the perfect match between frame and parts."

~Josh BMX

Extra length reinforced stainless steel 20mm drop out with built-in alloy tensioner, also included is a 10mm (3/8″) axle adapter.

20MM DROP OUT FRAME PLATES installed, additionally each frame includes a 10mm (3/8″) drop out frame plate set up.

20MM AND 10MM (3/8″) CHAIN TENSIONER SET BLOCKS, 15mm blocks available (Sold separately in Black Anodized only)

OUTER CHAIN TENSIONER BOLTS set up as well as Internal Chain tensioner Bolts included

~Chase

"Frameset delivered with IRC ‘’Ice Roller Coaster’’ chain tensioning system. Rear dropouts designed for a mounting with a rear Ø15mm thru-axle (Ø 15mm axle delivered with frameset ) or 10mm axle (adapters also delivered with frameset)."

~ICE Element

Forged and CNC machined Sliding Dropout Disc System with integrated chain tensioner

~RadioBikeCo

10mm rear dropouts (10mm enclosed dropouts on disc frames). Disc only frames have a 10mm disc hanger included

~Stay Strong

Marshal The Punisher V2: Our new rear dropouts feature an innovative rail system (DRS). DRS will allow you to connect various modules to your MARSHAL frame, such as our new chain tensioner, and our new GOPRO mount.

"CNC-machined alloy rear dropouts are compatible with 10mm, 15mm and 20mm rear axles with the included hardware and adapters. The Citizen frame is disc brake compatible with adapter"

~Haro

ON THE CONCORDE V2 WE HAVE INTEGRATED THE SWELL REAR LUG. A CLOSED REAR BRACKET DEVELOPED HERE IN-HOUSE SINCE 2017. IT OFFERS A 25MM ADJUSTMENT RANGE. THIS ALLOWS YOU TO ADJUST THE GEOMETRY OF THE FRAME TO YOUR RIDING STYLE AND THE MAPPING OF THE TRACK. THE SWELL DROPOUT IS 25% STIFFER THAN THE DROPOUTS FOUND ON THE FIRST GENERATION OF CONCORDE FRAMES. ITS SHAPE ALLOWS YOU TO WELD THE SEATSTAYS TO THE TOP OF THE DROPOUT AND THUS PROVIDE EVEN MORE RIGIDITY.

~Insypre

The Royal Finest is perfectly suited to riders wishing to move towards a racing type practice, it always benefits from the cutting-edge innovations and technologies developed by Sunn pilots for the Race.

NEW CycleCraft ELITE frames --100% hand made in the USA from 6061-T6 Alloy tubing, featuring integrated 1-1/8" - 1-1/2" tapered HT, DISC Brake only, CNC rear drop-outs, and European bottom brackets.

~Cyclecraft

"Rear dropouts especially designed for our frames for a precise setting of the disc brake (in Postmount standard) and wheel adjustment"

~ICE Element