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Vincita Rack Mount Seatpost Clamp - for Bike Without Rear Rack Threaded Hole Fixation - Suitable with Seatpost Diameter 31.8 mm (Seatpost Tube 34.9 mm) - Lightweight -Mountain, Road, Folding Bicycle.

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$15.50

$ 6 .99 $6.99

In Stock

About this item

  • [ SOLUTION FOR BIKE WITHOUT REAR RACK THREADED EYELETS ] : You can now mount a rear carrier with any bikes with Vincita seatpost clamp with rack mounts. It adds two M5 rear threaded eyelets to the seatpost. These eyelets can be fixation point for bike rear carrier.
  • [ MEASURE DIAMETER OF SEATPOST (NOT SEAT TUBE) BEFORE PURCHASE] : Our bike seatpost adapter is available in 2 seatpost sizes. Seatpost Diameter 27.2 mm ( Seatpost Tube 31.8 mm) and Seatpost Diameter 31.8 mm ( Seatpost Tube 34.9 mm) . *** Please measure your seatpost and seat tube before purchasing***
  • [ EASY INSTALLATION ] : Simply use an allen wrench to replace your old seatpost clamp with this bicycle clamp. There are three mounting screws included. The recommended tightening specification is 5 Nm (Newton metre).
  • [ LIGHTWEIGHT, HEAVY-DUTY ] : The seatpost collar only weights less than 50 grams. But once installed, it will tighten securely around your seatpost without slipping.
  • [ ENGINEERED TO ENDURE ] : This clamps are made of alloy and have been engineered for durability. It can take the daily conditions of biking.



Product Description

seatpost adapter

WHY CHOOSE VINCITA

since 1987

33+ Years of Adventurous Innovation

Founded in 1987, VINCITA is a Bangkok-based company dedicated to making modern and practical cycling bags.

Today VINCITA cycling bags are being used everywhere from Boston in the USA to Singapore and Europe.

Seeing photo from our customers worldwide is our greatest pride.

great quality

Top-Notch Quality

Our directors enjoy traveling, cycling and outdoor activities. Now aiming to bring more lifestyle-related designs to the market.

We listen to what cyclists tell us about their ideal products, find better solutions to solve their problems and then create them in the VINCITA design studio with our passionate team.

time

Engineered to Endure All Weather Conditions

We constantly innovates to make better bike bags to meet the needs of the diverse cyclist. We began making prototypes and having it used by many adventurous cyclists.

passion

Designed & Sold From Passionate Cyclists

Being travelers ourselves, we value the joy of traveling. Just like everyone else, we love seeing picturesque views of new places and finding new alternative routes.

Also enjoy meeting new people, exchanging stories and watching how traveling slowly changes our perspective of life.

.

“One’s destination is never a place, but a new way of seeing things” - Henry Miller


sunset bicycle
Wide selection of bicycle bags and accessories

We offer all type of bags from small saddle bag to large bicycle transport bag. Our bags and tools are designed to make packing and cycling earlier. Whether you are headed into the wide or just navigating around the city. We know your love seeking new adventures. Your next trip will be fuss-free with bags made to fit perfectly to your bike and your needs.

Let's travel more!

WHO WE ARE

WHO WE ARE

Vincita is a Bangkok based cycling bag and accessories company. Our story started differently: when we took our friends' suggestion to start a bag business in 1987, we were not experienced cyclists, but the company has changed slowly and transformed us into one. Our bag ideas originally came from gathering insights from all types of cyclists.

We talked about their lives, their concerns, and ideal products and the result is high-quality bag designs that meet the diverse requirement of cyclists.

  • Bike Seats & Saddle Bag
  • Bike Storage & Covers
  • Bike Tools & Accessories
  • Bike Bottle Cages & Racks
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Baumann Ralf
Reviewed in Germany on March 4, 2025
Schon verbaut und sieht auch noch gut aus.👍
Gilberto
Reviewed in Italy on September 20, 2024
l'installazione è stata perfetta
Louise
Reviewed in Australia on August 14, 2024
Simple straightforward adapter to attach rear rack stays to seat post
Mark S.
Reviewed in the United States on July 30, 2024
I needed this to attach a rear rack on my bike. This one has a larger bolt, thicker material than the original. This will fix 2 issues. One being the bike did not have attachment points for a rack. The other issue is I am a heavier rider and the seat post would slip down over time. Being a heavier made clamp, I was able to finally get enough pinch to keep the seat post from sliding down.
et-d15
Reviewed in the United States on March 8, 2024
I'm using it on an old Slingshot mtb frame that I use for self-supported off-road touring. The low profile design and solid attachment are really important for me when carrying heavier loads over bumpy off-road trails. I prefer the solid bolts over the quick release designs that stick out and are less secure (I use a torque wrnech to be sure.)
Alan
Reviewed in the United Kingdom on February 13, 2024
Beautifully made, to replace an ordinary seat tube clamp to provide you with attachment points to fit a rear carrier if your frame has no eyelets. You have to ensure you take accurate measurements of your frame and seat post to get the right size. Also check that your carrier attachment arms will reach the provided eyelets before purchasing at they are the same height as the clamp. Not the cheapest but very good quality.
Rob P.
Reviewed in the United States on December 30, 2024
Fit and finish was nice. Worked great.
PJR
Reviewed in the United States on October 31, 2024
Using it to attach a child seat. Works as advertised and seems solid.
Lord Zord
Reviewed in the United States on April 20, 2024
They have the size of the seat tube correct and that's what I went by, so I was good. But my seat post is the smaller size they have listed while my tube is the larger size. It made it confusing to purchase.I have a Giant Defy and maybe their tube and post sizes are different than normal.I suggest to go with the tube size, not the post like they recommend.
Alex B.
Reviewed in the United States on May 9, 2022
Perfect accessory to complete a rear bike rack install when your bike does not have rear 'lugs' to attach the rack support brackets to.As others have noted, indeed, this bracket does TWO THINGS (well!): 1) It REPLACES the bike's original compression 'clamp' that secures the seat post into the seat tube, 2) It provides the lugs to receive the rack support brackets.High quality build, well done.Remove your seat & seat post from the outer seat tube & carefully measure the OUTSIDE diameter of the TUBE (what the seat POST goes in to!)Convert inches to mm....1" = 25.4MM and order the bracket accordingly!Use proper metric allen/hex wrench to install.Very happy with the product & finished assembly...my rack is not gonna move!Yes, you will need to have an allen/hex wrench handy if you need to later adjust height of seat post in seat tube; but I'm really the only one that rides my bike, so that's not an issue for me.Would buy again!
DanoD
Reviewed in Canada on May 4, 2022
 
GC
Reviewed in the United States on June 21, 2021
Works well enough. Had to add a shim to get a snug secure fit.
Palmer
Reviewed in the United States on August 7, 2020
Purchased the 31.8mm clamp and received it measuring over 35mm. This didn’t fit or function and I had to return it. So bummed. This is what I needed to attach my child’s seat to my bike. I guess I’ll have to hunt for another and continue the wait to get her setup for an outing amidst this ridiculous virus with no where to go. This post clamp would have been a bit of freedom but it wasn’t because it was so poorly made. Even if it did fit, the tapped holes needed to be chamfered and redrilled because the anodizing clogged the threads in the holes. Poor workmanship.