SKU: 56074670538

Unbranded Vintage 172.5 mm Left Crank Arm

Sale price$18.90 Regular price$21.00
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  • CAN

Ships within 48 hours · Estimated delivery Aug 9 - Aug 14

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Description

Unbranded Vintage 172.5 mm Left Crank ArmOriginal part in production from the 1930s to the 1950s Suitable for historic cycling events such as L'Eroica Professionally checked & cleaned Worldwide shipping Unbranded vintage left crank arm, most likely in production from the 1930s to the 1950s. Made from steel and weighing in at 254 grams. A fine choice for keeping your vintage bike authentic, but also great for any other compatible bike too. If you're taking part in L'Eroica or a similar

✓ Original part - in production from the 1930s to the 1950s
✓ Suitable for historic cycling events such as L'Eroica
✓ Professionally checked & cleaned
✓ Worldwide shipping

Unbranded vintage left crank arm, most likely in production from the 1930s to the 1950s. Made from steel and weighing in at 254 grams. A fine choice for keeping your vintage bike authentic, but also great for any other compatible bike too.

If you're taking part in L'Eroica or a similar vintage event, this is fully compliant - so rest assured, the pre-1987 police won't lock you up for having the wrong crank!

The crank arm has been carefully cleaned, thoroughly checked by one of our mechanics and graded as poor condition, but do take a good look at the detailed photos so you can see the cosmetic condition before you buy.

OVERVIEW


Condition - Poor
Production Era - 1930s - 1950s
Material - Steel
Weight - 254 g
Stock Code - U-CA-SL20V

TECHNICAL INFO


Crank Arm Length - 172.5 mm
Pedal Threads - French (14 x 1.25mm)
Bottom Bracket Type - Cottered

SHIPPING, TAXES & RETURNS

We've been safely sending orders around the world since 2010. There's a handy shipping calculator on the shopping cart page so you can see the cost of postage as soon as you've added it to your basket. Your order will be carefully packed and sent with tracking & insurance, we despatch most orders within 2-3 days but larger items and orders placed before the weekend can take an extra day or two to process.

We accept returns, please notify us within 14 days and ensure the item arrives back with us no later than 30 days after the order was received.

EU Customers – for orders under €150 (excluding shipping), VAT will be collected at checkout, but from 1st July 2026, due to new EU import regulations, there may also be a customs duty payable to the carrier. For orders over €150, all import fees will be payable to the carrier, with nothing collected at checkout.

USA Customers – import fees are now collected at checkout for all orders to the US, so there won’t be any surprise charges when your order arrives.

Other International Customers – local import fees may still apply, charged by your customs office or courier before delivery. These are not collected by us, so please check your local rates before purchasing.

Any applicable fees will appear at checkout.

HELP SECTION

Crank Arm Length - this is measured from the absolute centre of the bottom bracket hole to the centre of the hole for the pedal.

Pedal Threads - the pattern of the thread that your pedals screw into, this is usually stamped on the pedals themselves and most bikes use a standard thread of 9/16” x 20 tpi. The exceptions being older French bikes, bikes with cheaper one-piece type chainsets and Shimano’s Dyna Drive system (easily identifiable as the pedal holes are about an inch wide!).

Bottom Bracket Type - ‘square taper’, as the name suggests have a square shaped axle that slots into the crank and ‘cottered’ axles are round and secured by pins - pretty much every bike up until the 1990s would use one of these, cottered being the much earlier system. Since then, different manufacturers have introduced their own systems that are not interchangeable so you must use a crank that matches.


Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 56074670538

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4.4 ★★★★★
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D
Verified Purchase
DBlvd
Waukegan, US
★★★★★ 5
EXCELLENT choice for the money!!!
Color: White, Number of Items: 1
I have never written a chair review, however; I feel this product warrants it. I got this chair to replace an old chair in my studio. I scoured Amazon for hours to find it, and I am glad that I took the time to do so! I was worried about material quality and durability at this price point, but my expectations were FAR exceeded. The piece goes together with a quickness (for me, under 10 minutes), and I only glanced at the instructions once. Suffice to say, setup is simple and intuitive. Once the chair is together, there is a slight amount of play where the base plate attaches to the shaft, however it isn't a ridiculous amount. I only noticed as I was examining it and being critical after my initial excitement. The materials used are very good, and much better than you would likely get from other chairs at this price. The chrome finish is nice, and the chair PU is uniform color with no defects. One really nice feature are the zippered arm rest covers; when they get dirty, which (being white) they eventually will, you can unzip them, lay them flat, and clean them laid out, as opposed to struggling to scrub around 90 degree angles. I am sure this was easier for the manufacturer, but the end result helps the end user as well. Good on them for that. Another thing I am very happy with is the height; I am 6'4" in bare feet, and my wife is 5'0". We both fit comfortably after adjusting. They definitely got the seat height right. And to that point (of size), at my height, and 260 pounds, there is plenty of room at the sides. Mind you, however, I am fit. That is not to say that a 5'10" guy that is 260 will find it comfortable. He may not. That said, most people should fit in this without an issue. The casters had a positive snapping-in, and roll over my low carpet easily. This chair is definitely well built, save for the slight play mentioned earlier. In no way does that detract from it at all. The aesthetic fits my studio perfectly, and in all, I would not hesitate to recommend this chair. If I have any issues with it, I will post an update review, but so far so good. I really love it. If you like the way it looks, pull the trigger. It is definitely worth the price, and more.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 6, 2021
J
Verified Purchase
JCM45
Massapequa, US
★★★★★ 5
A great choice at affordable price
Color: White, Number of Items: 1, Color: White, Number of Items: 1
The design of the chair is sleek and nice looking at a very affordable price and a decent quality. It is the cheaper version of a more expensive one. The wheels move easily; the back of the chair tilts just enough; it is a deep chair to support my back (only 5"3), so I added a back pillow making perfectly comfortable to provide support needed for long period of times. If I have a negative comment, it is about the back of the chair being black so purely matter of esthetic.: and armrests narrower than I'd like and wrapped with 2 pieces of leather connected with a piece of fabric a bit loose with a zipper which will allow overtime to be completely removed and left with chrome completely if wearing out or simply if you prefer that look so options. A great purchase
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Reviewed in the United States on March 5, 2025
L
Verified Purchase
Lil' Bit
Chelsea, US
★★★★★ 4
Great looking chair, a bit hard, fantastic value!
Color: White, Number of Items: 1, Color: White, Number of Items: 1
3 for comfort, 5+ for looks and 5 for ease of putting together so I landed on a 4+. I absolutely love the way this chair looks and it accents my other darker office items well. I'm 5'4" and can sit in the chair, all the way back without a pillow so the size works well for me. The back support is fine and you can adjust it if you want it straighter or rock back & forth. I changed out the casters for a more rollerblade type wheel when so I can't speak to the rollability of the included casters, but works well with the wheels I installed. Fantastic value and I'm soo glad I purchased it!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 17, 2026
A
Verified Purchase
A
Phoenix, US
★★★★★ 5
😃
Color: White, Number of Items: 1
Beautiful and easy to assemble. Very sturdy and great support for your back. Well worth the price and fits nicely with the computer desk. Very sleek and expensive looking. Pleased with my purchase.
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Reviewed in the United States on December 16, 2025
K
Verified Purchase
KAddison
Chelsea, US
★★★★★ 5
Unbelievable!!!
Color: White, Number of Items: 1, Color: White, Number of Items: 1
First off, let me say wow! When I received this, I didn’t expect much because of the price, but I am blown away with the care that was given in the packaging alone, the simplicity of putting it together with the detailed yet brief instruction page, and the ability to put this together with one person. Took me less than 40mins. Highly recommend!!! And in fact, I’m purchasing another one right now as I’m sitting here rocking in my new beautiful chair. UPDATE: a lot of negative reviews are basically user error. To attach the wheels, to snap on, I used a rubber (not metal) mallet to tap them in. To the leveling review, you have one arm on backwards. To the screw passing through, you may be correct but double check you didn’t use the required screws elsewhere. And the person saying it doesn’t recline, you have to release the lock - pull the up and down lever out and away from the seat. Good luck all! Bought a second one - same thoughts as above. Pretty awesome chair.
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Reviewed in the United States on January 5, 2025

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