Home

Explore

View Cart

Deals

Saved

Suggested searches

Plant-based protein powders
Vegan leather handbags
Bedroom decor
Waterproof jackets
Hoodies

Learn more about how we use your data to personalize your experience and ads. Recommendations are for informational purposes only.

R

Retrogression

Nitto B123AA SSB handlebar - Retrogression Fixed Gear

Nitto B123AA SSB handlebar - Retrogression Fixed Gear

Retrogression

Nitto B123AA SSB handlebar

4.5 (1,234)

Sold 100+ last 30 days

20% off first order

$95.00

Color

Black

Quantity

Product description loading

Product description loading

This is the product description text that will appear here.

Shop is the next step on our mission to make commerce better for everyone.

Start selling

For brands

For creators

Build your store

Information

Shop Pay

Help center

Social

X (Twitter)

Instagram

Legal

Terms of Service

Privacy Policy

Your Privacy Choices

Powered by

|

Start selling for free

Language

© Shopify Inc. 2026

Quantity

1

Nitto's legendary B123AA drops have been the standard drop bar used by Keirin racers in Japan for many years. Now it's available with a 31.8mm center to fit most modern OS stems.
Specifications • heat-treated aluminum for maximum strength
•...

Delivery & Returns

Retrogression

Retrogression

Retrogression

4.9 (726)

More from Retrogression

Nitto B123AA handlebar - Retrogression Fixed Gear

Nitto B123AA handlebar

Nitto B125AA handlebar - Retrogression Fixed Gear

Nitto B125AA handlebar

Soma HWY ONE compact drop handlebar - Retrogression Fixed Gear

Soma HWY ONE compact drop handlebar

FSA Omega handlebar - Retrogression Fixed Gear

FSA Omega handlebar

(3)

Nitto B125 CroMo handlebar - Retrogression Fixed Gear

Nitto B125 CroMo handlebar

YNOT pedal straps - Retrogression Fixed Gear

YNOT pedal straps

(8)

Izumi 410 ECO chain - Retrogression Fixed Gear

Izumi 410 ECO chain

(4)

EAI Deluxe track cog - Retrogression Fixed Gear

EAI Deluxe track cog

(15)

track axle spacers - Retrogression Fixed Gear

track axle spacers

Runwell ELITE axle nuts - Retrogression Fixed Gear

Runwell ELITE Hub Nuts

(9)

Newbaum's cloth handlebar tape - Retrogression Fixed Gear

Newbaum's cloth handlebar tape

(6)

PVC top tube protector - Retrogression Fixed Gear

PVC top tube protector

(6)

Related to Retrogression

State Bicycle Co.

Exclusive offer available

State Bicycle Co. - USB Rechargeable LED Bike Light (Set)

State Bicycle Co. - USB Rechargeable LED Bike Light (Set)

(61)

Wulf - Core-Line

Core-Line - Wulf

(410)

4130 - Matte Black / Mirror – (Fixed Gear / Single-Speed)

4130 - Matte Black / Mirror – (Fixed Gear / Single-Speed)

(77)

4130 - Hammered Powder Coat – (Fixed Gear / Single-Speed)

(6)

Free Wheel (16T or 18T)

Freewheel (16T or 18T)

(98)

State Bicycle Co - Alloy Platform Pedals (2 Colors)

State Bicycle Co - Alloy Platform Pedals (2 Colors)

(77)

Earthstone - Core-Line-State Bicycle Co.

Core-Line - Earthstone

(31)

State Bicycle Co. - Hardened-Steel U-Lock (Silicon Coated)

State Bicycle Co. - Hardened-Steel U-Lock (Silicon Coated)

(68)

4130 - Matte Olive – (Fixed Gear / Single-Speed)

4130 - Matte Olive – (Fixed Gear / Single-Speed)

(66)

20% off

State Bicycle Co. | NFL Collection - Cycling Cap

(37)

4130 All-Road - Alpine Bloom (12 Speed / UDH)

(7)

4130 All-Road - Raw Phosphate (12 Speed / UDH)

(40)

WC

Wabi Cycles

4.9

(596)

Wabi Fixed Cog, 1/8", 17T, Black

Wabi Fixed Cog, 1/8"

(3)

Wabi Sub-15 Superlight (1475g) 700C 20H/24H Single Speed/Fixed Wheelset-Wabi Cycles

40% off

Wabi Sub-15 Superlight Race Single Speed-Fixed Gear Wheelset, 1475g

(52)

Wabi Composite Platform Pedals with Wide Straps

(3)

Wabi Forged Aluminum Stem, 26mm-Wabi Cycles

Wabi Forged Aluminum Stem, 1-1/8" Threadless, +/-17d, 26mm

(18)

Wabi 8mm Hex Wrench Adaptor-Wabi Cycles

Wabi 8mm Hex Wrench Adaptor

(7)

Wabi Riser Handlebar Wabi Cycles

Wabi Riser Handlebar, 560mm, 26mm clamp, 22.2mm grip

(7)

Wabi Classic, Willow Green, Silver Components, Brown Saddle/Tape

Wabi Classic Complete Build

(2)

Wabi Bullhorn Bars, 26mm Wabi Cycles

Wabi Bullhorn Bars, 26mm

(10)

Replacement Tire Tubes, 700C and 650C Wabi Cycles

Replacement Tire Tubes, 700C and 650C

(1)

Tange Bottom Bracket, 103mm, JIS-Wabi Cycles

Tange Bottom Bracket, Square Taper, JIS

(8)

Izumi ECO Fixed/Single Speed Chain, 1/8", 116L-Wabi Cycles

Izumi ECO Fixed/Single Speed Chain, 1/8", 116L

(2)

Wabi Wide Pedal Straps

(1)

Track Lab

5

(71)

Dura Ace NJS Lockring

(4)

Track Lab Sticker Pack

(2)

Dura Ace NJS Cog 13t

(1)

Aarn x Mash Chainring Rainbow 47t

Dura Ace NJS Cog 16t

Thomson X4 Stem Black/Silver 70mm 31.8 0deg

Mavic Ellipse Wheelset Black 20h - Rear Wheel for Parts

(1)

Track Lab Skull Logo Hoodie Black

Track Lab Logo T Shirt Black

Wheel Display Stand

(1)

Sugino NJS Lockring

Thomson X4 Stem Black 110mm 10deg 31.8

VM

Velo Mine

4.9

(101)

33% off

H Plus Son Archetype rims Polished Silver Track Bike Fixed Gear Single Speed Wheelset Radial Front

(2)

27% off

Sun Rhyno Lite 26" Mountain Bike Wheels Wheelset Shimano 32h Deore Hubs disc or rim brake

(1)

84% off

S Ride 1x 12 Speed 3 pc Mountain Bike Groupset shifter, 11-46 cassette, Rear Derailleur

SRAM PC 870 Chain with Power Link, 7/8-Speed, 114-Link, Silver/Grey

Tektro 877.12 High Performance MTB Linear Pull Brake Pad - Cartridge Type Brake Shoes

Tektro 877.12 High Performance MTB Linear Pull Brake Pad - Cartridge Type Brake Shoes

SRAM S900 Aero HRD Brake Lever Master Piston Kit

10% off

KMC e101 eBike Chain - Single Speed 1/2" x 1/8", 112 Links, Gold

36% off

Velocity A23 Track Bike Fixed Gear Singlespeed Wheels Silver 700c

(1)

Wheelset Campagnolo 700c Zonda C17 Campagnolo 9-12S Black Clincher Rim Brake Wheelset

Detroit Bikes Single Speed Red Wheelset 700c 32 Spoke 17t Freewheel

(1)

2% off

Vision Team 30 Comp TL Wheelset - 700C, QR x 100/130mm, Rim Brake, HG 11, Black

KMC S1 RB Chain - Single Speed 1/2" x 1/8", Silver, Bulk 250 Foot Roll

Discover top brands

Fashion Nova

4.3 (428.9K)

Mandala Scrubs

Exclusive offer available

Mandala Scrubs

4.6 (11K)

OOFOS

Exclusive offer available

OOFOS

4.5 (178.3K)

Revice

4.5 (8.5K)

32 Degrees

4.7 (227.8K)

Rockstar Original

Rockstar Original

Rockstar Original

4.6 (180.5K)

Aviator Nation

Exclusive offer available

Aviator Nation

4.5 (89.3K)

Culture Kings US

Culture Kings US

Culture Kings US

4.7 (145.9K)

Little Sleepies

Exclusive offer available

Little Sleepies

4.9 (398.7K)

Exclusive offer available

The GLD Shop

4.7 (167.1K)