--- product_id: 7221251 title: "20T Chainring 64 BCD MicroDrive" brand: "amtber" price: "593 kr" currency: DKK in_stock: true reviews_count: 8 category: "A Mt Ber" url: https://www.desertcart.dk/products/7221251-20t-chainring-64-bcd-microdrive store_origin: DK region: Denmark --- # Lightweight 32g fits SRAM & Shimano 20T precision teeth for ultimate climbing Durable stainless steel resists rust & wear 20T Chainring 64 BCD MicroDrive **Brand:** amtber **Price:** 593 kr **Availability:** ✅ In Stock ## Summary > ⚡ Elevate your climb, dominate every trail! ## Quick Answers - **What is this?** 20T Chainring 64 BCD MicroDrive by amtber - **How much does it cost?** 593 kr with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/7221251-20t-chainring-64-bcd-microdrive) ## Best For - amtber enthusiasts ## Why This Product - Trusted amtber brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Last:** Crafted from high-grade stainless steel for unmatched durability and rust resistance on every ride. - • **Modular Mastery:** Ideal granny gear for 2X and 3X drivetrains, compatible with top brands like Blackspire and Wolftooth. - • **Climb Like a Pro:** 10% more climbing power than a standard 22T chainring—conquer every hill with ease. - • **Featherweight Performer:** At just 32 grams, it delivers power without weighing you down—perfect for serious riders. - • **Universal Compatibility:** Seamlessly works with 8-12 speed chains and major MTB cranks like Shimano, SRAM, Raceface, and more. ## Overview The 20T Chainring 64 BCD MicroDrive is a precision-engineered stainless steel chainring designed to boost climbing efficiency by 10% over standard 22T rings. Weighing only 32 grams, it supports 8 to 12 speed chains and fits a wide range of MTB cranksets including Shimano and SRAM. Its durable construction and broad compatibility make it the go-to granny gear for serious cyclists seeking reliable, lightweight performance on challenging terrain. ## Description 10% More Climbing Power that a 22T Chainring. Works with all Chains - 8,9,10,11 and 12 speed. Great for 2X drivetrains and 3X drivetrains. Works with Shimano, SRAM, Raceface, FSA, E13 and other MTB cranks. Perfect granny gear for: 8 speed 9 speed 10 speed 11 speed 12 speed Use along with Blackspire, Wolftooth, Absolute Black and other chainrings for 2X and 3X systems. Review: Awesome Low Gear - 20 teeth = smooth torque with finesse to climb anything effortlessly. I LOVE IT High quality stainless steel is tough, long lasting and does not rust. Light filing of aluminum crank was needed for chain clearance. VERY HIGHLY RECOMMENDED Review: Usable - ten years after update! - I wanted to try out this idea. I was first disappointed because being steel, it is very heavy. Probably twice the weight of my aluminun 48t ring. I did not order the spacer because I thought the spacer from my old 24t would work. It doesn't really, it gets squashed and deformed to an extent. So maybe you want to order the spacer at the time you order. On my test run, I rode up a mountain called Mt. Wilson near LA. The vertical climb there is quite challenging. Could only be slightly happier with the performance of this ring. It was a little noisy but the climb was much easier than I'd ever had it before. By the time I reached the peak, I had a lot of energy left, which I never before experienced (in other words, normally I'd be half dead) Rear cassette: 11-34t Now this happy experience was frustrated when I upgraded my chain and cassette. Well, the cassette wasn't really a problem. Here's the problem: highs and lows. The teeth on this ring are longer and sharper ("My what sharp teeth you have, granny!") and the valleys between the teeth much lower than most chainrings you meet. The height of the teeth and sharpeness appear to actually very slightly slow down the physical engagement of the chain and also create the additional noise I earlier mentioned. This added height might also very well create more resistance that add to the wear and tear. The height of the teeth is really not much of a problem compared to the depth of the valleys between teeth. The full effect of this really depends on your chain. Using my old chain, there was no problem - KMC 9sp, light but not SL. But when I upgraded to KMC SL 9sp, the hollow kind, all Hell broke loose. The newer chainlinks must be ever so slighly longer because the links rest lower in the valleys than my old chain. This is a complete disaster because when that happens, the chain actually rubs and becomes elevated by, on one side, the mounting bolts and on the other side, the crank bolt hole structure. What happens then? The chain does not engage at slope induced forces. I mean, when you're going uphill, the chain slips entirely. After installing the chain, I was going to do the Mt. Wilson trail but could not even begin it, I got maybe a 20th of the way before I had to turn back. The problem is not with the chain but the design of the chainring. Beware if you are using a higher end chain. I went ahead and made modifications to my bike however. I grinded down both the mounting bolts and the crank hole molding. I also reduced the sharpness of the chainring's teeth. Just a little. Now everything works and it's not nearly as noisy as it was. Summarize design flaws: #1. The valleys between teeth are way too low. Or, maybe more importanly, the base of the teeth should be wider. #2. There should be a recessed area in which the bolts are driven. Slightly more expensive versions have this recess and it is very important. Without it, depending on the chain you use, the chain could ride on the bolts and not engage when you need it most. If you don't mind doing a little modifying, this chainring can work for you. It's now working fine for me. In the future, I will probably buy a higher end titanium version and hopefully, the titanium version will not have the design mistakes of this model. 10 years later. No, no! I no longer have it! It lasted several years and I was real happy with it. (I had plenty of 24s and 22s laying around so I never bought another 20t) These ten years later, I'm again searching for a 20t and wow, here it is. I did not recognize my own review until I saw "Mt. Wilson" Hey, that's the mountain I ride up! ...oh. I only gave this chainring 3 stars. That wasn't very nice. It deserves 4 or 5. But I'm not buying it again just yet. when I bought it last time it was only about 7 bucks or so. I think... Now they want nearly $40! I'm not sure if that's a good deal at this time. It's starts to look more practical to upgrade my hub to XD or other so I can get a greater compensating range. Personally, I'd rather just get the 20t but I must be practical... ## Features - 20 Tooth / 64 BCD - 10% More Climbing Power that a 22T - Long Lasting / Stainless - 32 grams / SRAM and Shimano compatible - Fits 8,9,10 & 11 speed chains ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00CDW9CC0 | | Best Sellers Rank | #595,591 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #447 in Bike Chainrings | | Brand Name | aMTBer | | Color | silver | | Customer Reviews | 4.4 4.4 out of 5 stars (25) | | Date First Available | April 16, 2013 | | Manufacturer | aMTBer Products | | Material | Stainless | | Part Number | 0020T | | Size | 20 Tooth | ## Images ![20T Chainring 64 BCD MicroDrive - Image 1](https://m.media-amazon.com/images/I/81tVOZtPshL.jpg) ![20T Chainring 64 BCD MicroDrive - Image 2](https://m.media-amazon.com/images/I/51tIw4MkA8L.jpg) ![20T Chainring 64 BCD MicroDrive - Image 3](https://m.media-amazon.com/images/I/41oOQ8-d0AL.jpg) ![20T Chainring 64 BCD MicroDrive - Image 4](https://m.media-amazon.com/images/I/81QEv7LjEKL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Awesome Low Gear *by A***S on June 5, 2025* 20 teeth = smooth torque with finesse to climb anything effortlessly. I LOVE IT High quality stainless steel is tough, long lasting and does not rust. Light filing of aluminum crank was needed for chain clearance. VERY HIGHLY RECOMMENDED ### ⭐⭐⭐⭐ Usable - ten years after update! *by D***S on June 30, 2013* I wanted to try out this idea. I was first disappointed because being steel, it is very heavy. Probably twice the weight of my aluminun 48t ring. I did not order the spacer because I thought the spacer from my old 24t would work. It doesn't really, it gets squashed and deformed to an extent. So maybe you want to order the spacer at the time you order. On my test run, I rode up a mountain called Mt. Wilson near LA. The vertical climb there is quite challenging. Could only be slightly happier with the performance of this ring. It was a little noisy but the climb was much easier than I'd ever had it before. By the time I reached the peak, I had a lot of energy left, which I never before experienced (in other words, normally I'd be half dead) Rear cassette: 11-34t Now this happy experience was frustrated when I upgraded my chain and cassette. Well, the cassette wasn't really a problem. Here's the problem: highs and lows. The teeth on this ring are longer and sharper ("My what sharp teeth you have, granny!") and the valleys between the teeth much lower than most chainrings you meet. The height of the teeth and sharpeness appear to actually very slightly slow down the physical engagement of the chain and also create the additional noise I earlier mentioned. This added height might also very well create more resistance that add to the wear and tear. The height of the teeth is really not much of a problem compared to the depth of the valleys between teeth. The full effect of this really depends on your chain. Using my old chain, there was no problem - KMC 9sp, light but not SL. But when I upgraded to KMC SL 9sp, the hollow kind, all Hell broke loose. The newer chainlinks must be ever so slighly longer because the links rest lower in the valleys than my old chain. This is a complete disaster because when that happens, the chain actually rubs and becomes elevated by, on one side, the mounting bolts and on the other side, the crank bolt hole structure. What happens then? The chain does not engage at slope induced forces. I mean, when you're going uphill, the chain slips entirely. After installing the chain, I was going to do the Mt. Wilson trail but could not even begin it, I got maybe a 20th of the way before I had to turn back. The problem is not with the chain but the design of the chainring. Beware if you are using a higher end chain. I went ahead and made modifications to my bike however. I grinded down both the mounting bolts and the crank hole molding. I also reduced the sharpness of the chainring's teeth. Just a little. Now everything works and it's not nearly as noisy as it was. Summarize design flaws: #1. The valleys between teeth are way too low. Or, maybe more importanly, the base of the teeth should be wider. #2. There should be a recessed area in which the bolts are driven. Slightly more expensive versions have this recess and it is very important. Without it, depending on the chain you use, the chain could ride on the bolts and not engage when you need it most. If you don't mind doing a little modifying, this chainring can work for you. It's now working fine for me. In the future, I will probably buy a higher end titanium version and hopefully, the titanium version will not have the design mistakes of this model. 10 years later. No, no! I no longer have it! It lasted several years and I was real happy with it. (I had plenty of 24s and 22s laying around so I never bought another 20t) These ten years later, I'm again searching for a 20t and wow, here it is. I did not recognize my own review until I saw "Mt. Wilson" Hey, that's the mountain I ride up! ...oh. I only gave this chainring 3 stars. That wasn't very nice. It deserves 4 or 5. But I'm not buying it again just yet. when I bought it last time it was only about 7 bucks or so. I think... Now they want nearly $40! I'm not sure if that's a good deal at this time. It's starts to look more practical to upgrade my hub to XD or other so I can get a greater compensating range. Personally, I'd rather just get the 20t but I must be practical... ### ⭐⭐⭐⭐⭐ Too much efficency *by R***U on December 8, 2020* I.installed this on a 7 speed and didnt have the need to file down the bolts. I think a 7 speed chain is wide enough that it does not run the inner bolts. Aside from that this chainring is probably a little overkill on the trails. I don't have to use the last gear on the back. It is awesome to be able to climb with a little more ease with this 20t. I came back to review in hopes to order another one but see that is out stock. Bummer and thank you, and please stock this asap! Edit: I mentioned earlier about not having to make any modifications. However, when I changed the cassette the chain started to catch on the inner chainring bolts. I took a dremel and grinded the bolts until it was smooth and flush with the surface of the middle chainring. Now the chain does not catch and all is well again. I since then ordered a second granny gear. ## Frequently Bought Together - aMTBer 20T Chainring 64 BCD MicroDrive - Sumind 11 Pieces Bike Carbon Fiber Headset Spacer Bicycle 1-1/8 Inch 20 15 10 5 3 2 1 mm, 7 Size --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.dk/products/7221251-20t-chainring-64-bcd-microdrive](https://www.desertcart.dk/products/7221251-20t-chainring-64-bcd-microdrive) --- *Product available on Desertcart Denmark* *Store origin: DK* *Last updated: 2026-04-22*