Length
Angle

“So long, on the track you’re practically riding in your own slipstream”

The longest of longboi’s, this sprint stem extends your reach out for a more aerodynamic position to get the most out of the UCI geometry regulations.

The Elite Longboi is the stiffest stem we have created and tested to date! The stems have exceeded 2x the fatigue and static overload ISO requirements for racing bicycle steering components.

Designed in collaboration with Cycling New Zealand for Tokyo Olympics.

Geometry

Traditional stem measurements like length and angle don’t easily show you where the stem actually places your handlebar. This calculator uses your bike’s head tube angle to determine the exact reach and stack coordinates of the Elite Longboi Stem giving you precise data to optimise your fit.

Illustrated is a 150mm -6stem at a 74

Longboi Stem Geometry Calculator

© The intellectual property for this product is owned by Velobike Innovation Limited. All rights reserved.

Technical Specifications
  • UCI certified for competition use
  • JKA certified for Japanese's Keirin Racing 
  • ISO 4210-5:2023 certified (tested to 2x the ISO requirements)
  • 120mm to 200mm lengths
  • +/-6, +/-12 or +/-16 degree angle options
  • Reversible mounting capability (angled up or downward)
  • Aero design developed using CFD software
  • Rear mounted stem cap bolts for reduced aerodynamic drag
  • Titanium hardware for weight reduction
  • Low profile steerer tube clamp for greater integration with notched headtube framesets
  • Material: Hard anodised 7075-T6 aluminium
  • Weight: 150mm/6deg - 250g
  • Steerer diameter: 1-1/8th
  • Bar clamp diameter: 31.8mm
  • Bar clamp width: 48mm
  • Steerer clamp stock height: 32mm
Design Specifications
  • Velobike Innovation proprietary Gen3 tooth profile
  • Precision CNC Machined
  • Gen3 tooth profile
  • Chamfered relief cutout on rear side for weight reduction. The chamfered edged help air flow over the ridges reducing flow separation
  • Stepped surface design between teeth and the main body of the chainring plate keeps the chain outer plates flush with the chainring to reduce air flow separation
  • Tough anodised surface treatment, infused with a hi-tech low friction compound
  • JKA certified for Japanese's 250 Keirin Racing (48-68t)
Spare Parts & Extra Accessories

Replacement screws are available here.

Installation Tips
  • Use a long hex driver and a torque wrench to torque up the reverse facing screws to a maximum of 5Nm
  • Use copper grease on screw threads (grease not included)
Black bicycle crank arm with Velobbike branding on a white background

Customers praised this premium track bike stem for exceptional stiffness and rigidity, even at extended lengths (120-200mm). Reviews highlighted "bulletproof," "solid as a rock" construction ideal for sprinting and aggressive positioning. The stem enables optimal aero fit with "zero flex" under high power. One customer noted it's "overpriced," but most agreed quality justifies cost. Fast global delivery and beautiful packaging consistently mentioned.

  • 5 stars: 116 (97%)
  • 4 stars: 2 (2%)
  • 3 stars: 1 (1%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
J
Jonathon K.
There Is A Reason This Stem is On All The World's Fastest Bikes

This is my third Elite Longboi, but only because as my bike geometry changes I need to change my stem. The stem itself is bulletproof and absolutely rigid.
I am a heavy sprinter with a strong upper body, and this is the only stem I've ever ridden that did not budge under the load of a standing start.

G
Ggg
Perfect for an aggressive aero position

I’ve already bought two of these Velobike stems, and they’ve been excellent. They’re especially good for riders who want a more aero position, as they allow you to get really low and comfortable over the bars.

The stiffness is also very impressive. Even during high-power efforts, the front end feels solid and direct, which gives a lot of confidence when pushing hard.

I’m already considering buying another one in a different angle. It’s a very well-designed stem that makes a real difference to both fit and ride feel.

S
Samuel B.
Weapon

Build quality, aesthetics, attention to detail, design. 10/10

L
Longboi 1.1.
Top Quality

I installed a 160mm longboi on my track bike, it is a high end product for sure. The stifness is incredible for the weight is has. Super happy with my new acquisition! Thank you guys!

S
Sean H.
Great products and packaging

I have order several parts, all came quickly in beautiful packaging. I will continue to order from velobike.

J
Joe S.
Turns you into a fast AF boi

Went for the 200mm, 6° longboi to get that nice flat forearm position in the drops. Feels super sturdy and well made - this stem is gonna last forever. Thank y'all for making great, strong products for us 🙏

A
Anonymous
Velobike Longboi

Awesome stem! Stiff and looks nice.

R
Renata U.
Excelente producto 🇨🇱

muy buena calidad

A
Anders L.
Best 160mm stem on the market

I’ve been searching for a quality 160mm stem for a while, and I finally found the Longboi stem from Velobike. An added bonus was that it received it 2 days after I ordered it. Great product and even better customer service. Thanks

J
JH3
Long and low

Best track stem available! Super stiff and the quality is unmatched.

J
Jernej C.
Elite Longboi Stem - 170mm

I have bought Elite Longboi Stem - 170mm and it’s just the right size for my needs. I must say it is a true craftsmanship. I recommend it if you need to extend your reach.

R
Roger R.
Upgrade

So far, Miguel Indurain's signature has been the best thing about my bike. That has changed😃.

V
Victor B.
Got the short longboi 😁

Ok, I am weak, I took the 120mm one.
My excuses? Well, the bikefit said 120 is enough for now.

So I could have bought another brand? No. Who wants another stem than the longboi on its track bike?!

Like, it's aero, sturdy AF, titanium bold, low stack, and.... Just beautiful.

I also got the front plate with Garmin mount to check if my 200 watts are still somewhere.

J
James T.
Light and strong

Fantastic when paired with some aero endurance bars for track league

M
Maxim K.
Longboi stem 170mm

The part is made well, looks super strong and reliable. I was glad to receive my Longboi and am completely satisfied with the purchase!!

D
Dini A.
Most Reliable and Stiffest stem out there!

Absolutely love this stem, hard to come across a stem that's longer than 150mm.
Incredible stiffness and the simplicity in the machine is immaculate, indeed beautiful made for all rounder, May consider getting more of these for the rest of the bikes HAHA

a
allah
Long, hard and stiff

You can't find this quality anywhere else. The stiffness and length is out of this world.
Length, increased. Stiffness, increased. Comfort, increased. Aura, increased for sure. No regrets 😃

k
kewlwj M.
amazing experience

sometimes it is not really about the product but the speed and quality of service that matters. received a personalised card and some extra gifts from their staff. placed my order at 2am on 25th june and received it 2pm on 26th june. speed of delivery is also something else. will shop here again!

C
Charles M.
Great company, great products!

High quality stem in hard to find size. Very quick delivery. I also have the VeloBike track sprint handlebars, which are wonderful. A pleasure doing business with this company.

J
Jeff J.D.
This Stem is Unmatched: Engineered for Champions

Absolute Confidence on the Ride

I recently upgraded my Stomm stem to the Longboi, and it's nothing short of a game-changer. This stem has redefined my expectations for what a stem can be.

Unmatched Design

From the moment I saw the Longboi, I knew it was special. The reverse bolt pattern is not just aesthetically pleasing, it feels incredibly secure and flex-free in the handlebars. Unlike other stems that feel bulky or generic, the Longboi is precision crafted with a purpose.

Built to Handle the Pressure

As a competitive cyclist, pushing my limits is everything. The Longboi gives me the unwavering confidence I need to sprint for victory. I've reached UCI limits with my current setup, and the stem feels rock solid. The hardware is top-notch, and the overall quality is unmatched by anything else on the market. There's no doubt in my mind that this stem can handle the immense torque of a World Championship sprint finish.

C
Chris F.
12cm Long Boi Head Stem

My new head stem is strong, sturdy and compliments my bunch bars and track bike perfectly.

J
Josh B.
Craftsmanship at its finest!!

After knowing about the Longboi stem for genuinely years, I finally pulled the trigger and order myself one. Firstly, shipped to Aus is literally 2 days! Secondly, the craftsmanship of this stem is next level, everything is machined perfectly, threads for the bolts so smooth AND it feels indestructible. Add to that I've finally been able to nail my position on the bike with the long stem length and I couldn't be happier!

C
Chris C.
Great Product - Great Service

Excellent Service

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