---
product_id: 14759352
title: "Altus Mountain Bike Rear Derailleur - Direct Mount - RDM310"
brand: "shimano"
price: "$135"
currency: NZD
in_stock: true
reviews_count: 11
category: "Shimano"
url: https://www.desertcart.nz/products/14759352-altus-mountain-bike-rear-derailleur-direct-mount-rdm310
store_origin: NZ
region: New Zealand
---

# Durable black metal build 43T chain wrap capacity 8-speed Shimano/SRAM compatible Altus Mountain Bike Rear Derailleur - Direct Mount - RDM310

**Brand:** shimano
**Price:** $135
**Availability:** ✅ In Stock

## Summary

> ⚙️ Shift into the future with Shimano Altus – where precision meets power!

## Quick Answers

- **What is this?** Altus Mountain Bike Rear Derailleur - Direct Mount - RDM310 by shimano
- **How much does it cost?** $135 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/14759352-altus-mountain-bike-rear-derailleur-direct-mount-rdm310)

## Best For

- shimano enthusiasts

## Why This Product

- Trusted shimano brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** Solid metal construction ensures durability for urban commutes and rugged trails alike.
- • **Direct Mount Design:** Streamlined installation with a sleek braze-on mount for a clean bike profile.
- • **Robust 43-Tooth Capacity:** Conquer steep climbs and varied terrain with ample chain wrap.
- • **Precision Shifting Mastery:** Experience flawless, whisper-quiet gear changes every ride.
- • **Seamless 8-Speed Compatibility:** Optimized for Shimano/SRAM 8-speed drivetrains for smooth integration.

## Overview

The SHIMANO Altus RDM310 is a direct mount rear derailleur engineered for 7/8-speed mountain and city bikes. Featuring a robust 43-tooth chain wrap capacity and compatibility with Shimano/SRAM 8-speed drivetrains, it delivers smooth, quiet shifting with durable metal construction. Ideal for riders seeking reliable performance and easy installation on a variety of sprocket sizes up to 34 teeth.

## Description

ALTUS is a 7/8-speed MTB-style component group for city sport and youth bikes.

Review: Great value, easy to install. Shifts perfectly and quietly. - A great derailleur for the price, shifts perfectly and quietly and is totally silent while operating on all sprockets. It is easy to install with a just a few allen wrenches, I didn't bother taking apart the chain, I just disassembled the cage slightly to get the chain inside it. Adjusting was slightly more difficult. The only issue is that there are no paper instructions for installation and especially ADJUSTING it. It is essential to adjust the low and the high limits to align the upper jockey wheels and chain with the low and high sprockets, THEN just as importantly, when derailleur is on smallest sprocket remove ALL slack on the cable by pulling the cable tight when the cable attachment bolt is loose, then retightening the bolt, and/or by screwing the cable adjustment barrel until the derailleur just starts to move inward to the next gear. Maximum rear sprocket size is supposedly 34 tooth, and I found it best the adjust the B tension screw inward quite a bit (the one on the bracket that limits the derailleur front and back swivelling) to help the upper jockey wheel clear the larger sprocket (28 tooth in my case) better. Once installed and adjusted, it worked PERFECTLY every time.
Review: Excellent derailleur for the money, especially with LARGE rear sprockets - I bought this derailleur to replace the stock unit on a beach cruiser that I converted into a motorbike. I needed something sturdy and, most importantly, with enough clearance to fit around the HUGE sprocket that I have on the bike (34 teeth). This unit fit the bill perfectly - only required some minor adjustment with the set screws and within 15 minutes I was back in action. The only thing I needed to do we steal a longer B-screw (the screw that determines how far the derailleur's upper flywheel sits from the cassette) from the old derailleur, because the screw that came with this one wasn't long enough. This is ONLY because my bike is a beast of customization and I needed to improvise - but the longer B-screw worked flawlessly. In case anyone else out there is attempting to build a shiftable motorbike, I highly recommend this rear derailleur. It's super easy to install, came properly tuned right out of the box, is very sturdy and solid when riding, and most importantly it fits over just about any sprocket size you might have in the back! They make a ridiculous 42-tooth sprocket which I'm going to try putting on this bike (because the clutch doesn't like taking off even with the 34T sprocket...) and I'm confident this derailleur will even work with that.

## Features

- metal
- Imported
- Chain Wrap Capacity: 43teeth, Derailleur Action: Top-Normal (Traditional)
- Derailleur Color: black, Drivetrain Spacing: Shimano/SRAM 8, Largest Cog: 34teeth
- Shifter/Rear Derailleur : Shimano, Speeds: 8sp, Weight: 326g

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B005CMUQU0 |
| Best Sellers Rank | #93,281 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #31 in Rear Bike Derailleurs |
| Brand Name | SHIMANO |
| Customer Reviews | 4.6 4.6 out of 5 stars (6,035) |
| Date First Available | May 2, 2008 |
| Global Trade Identification Number | 00689228130920, 04524667130925 |
| Included Components | Bike Parts |
| Item Dimensions LxWxH | 8.86 x 6.22 x 4.06 inches |
| Item Package Dimensions L x W x H | 9.17 x 7.2 x 6.5 inches |
| Manufacturer | Shimano |
| Model Name | C8C063 |
| Model Year | 2016 |
| Mounting Type | Braze-On Mount |
| Number of Items | 1 |
| Package Weight | 0.45 Kilograms |
| Part Number | RDM310DL |
| Product Dimensions | 8.86"L x 6.22"W x 4.06"H |
| Size | DIRECT MOUNT |
| Sport Type | Cycling |
| Style | Rear Derailleur |
| Suggested Users | unisex-adult |
| UPC | 713831856783 620307457880 689228130920 750076832677 787766457704 |
| Warranty Description | 2 Year Manufacturer |

## Product Details

- **Brand:** SHIMANO
- **Color:** Black
- **Item Weight:** 0.11 Pounds
- **League:** Shimano
- **Material:** Alloy Steel

## Images

![Altus Mountain Bike Rear Derailleur - Direct Mount - RDM310 - Image 1](https://m.media-amazon.com/images/I/51sZq0ff2sL.jpg)

## Available Options

This product comes in different **Color** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great value, easy to install. Shifts perfectly and quietly.
*by J***V on October 8, 2024*

A great derailleur for the price, shifts perfectly and quietly and is totally silent while operating on all sprockets. It is easy to install with a just a few allen wrenches, I didn't bother taking apart the chain, I just disassembled the cage slightly to get the chain inside it. Adjusting was slightly more difficult. The only issue is that there are no paper instructions for installation and especially ADJUSTING it. It is essential to adjust the low and the high limits to align the upper jockey wheels and chain with the low and high sprockets, THEN just as importantly, when derailleur is on smallest sprocket remove ALL slack on the cable by pulling the cable tight when the cable attachment bolt is loose, then retightening the bolt, and/or by screwing the cable adjustment barrel until the derailleur just starts to move inward to the next gear. Maximum rear sprocket size is supposedly 34 tooth, and I found it best the adjust the B tension screw inward quite a bit (the one on the bracket that limits the derailleur front and back swivelling) to help the upper jockey wheel clear the larger sprocket (28 tooth in my case) better. Once installed and adjusted, it worked PERFECTLY every time.

### ⭐⭐⭐⭐⭐ Excellent derailleur for the money, especially with LARGE rear sprockets
*by M***. on July 25, 2014*

I bought this derailleur to replace the stock unit on a beach cruiser that I converted into a motorbike. I needed something sturdy and, most importantly, with enough clearance to fit around the HUGE sprocket that I have on the bike (34 teeth). This unit fit the bill perfectly - only required some minor adjustment with the set screws and within 15 minutes I was back in action. The only thing I needed to do we steal a longer B-screw (the screw that determines how far the derailleur's upper flywheel sits from the cassette) from the old derailleur, because the screw that came with this one wasn't long enough. This is ONLY because my bike is a beast of customization and I needed to improvise - but the longer B-screw worked flawlessly. In case anyone else out there is attempting to build a shiftable motorbike, I highly recommend this rear derailleur. It's super easy to install, came properly tuned right out of the box, is very sturdy and solid when riding, and most importantly it fits over just about any sprocket size you might have in the back! They make a ridiculous 42-tooth sprocket which I'm going to try putting on this bike (because the clutch doesn't like taking off even with the 34T sprocket...) and I'm confident this derailleur will even work with that.

### ⭐⭐⭐⭐⭐ Excellent derailleur
*by C***L on June 12, 2023*

Paired this with a Shimano Altus right side trigger shifter, 7 speed. Installed this onto a Mongoose Ardor due to the cheap Pro Rush derailleur binding the chain up real bad when hitting a small jump or bunny hopping a little higher than an inch. Like, the derailleur would skip the chain off one of the pulley cogs and it would stick between the metal guides and the cog. These two, once installed and tuned, are tuned to work perfectly with each other. My derailleur hanger was checked with my Park Tools DAG alignment tool, and the derailleur hanger wasn't really bent hardly at all, but it doesn't hurt to ensure good hanger alignment before installing any new equipment. This derailleur is working fine on the Pro Rush freewheel 7 speed gear set, since it's paired with its proper Shimano Altus shifter counterpart. That's where people mess up, is pairing a new derailleur like this Shimano with the older shifter like the Pro Rush that was on the bike. I'll update the review if the Shimano Altus just breaks or craps out, but the first ride out it shifted very very nicely, and even handled several little jumps with no chain slippage or binding. I just am not ready to upgrade the rear wheel to a free hub with higher than 7 speeds, so finding this derailleur and shifter combo worked out great. :)

## Frequently Bought Together

- SHIMANO Altus Mountain Bike Rear Derailleur - Direct Mount - RDM310
- Shimano FD-M310 Aultus Front Derailleur (28.6-34.9-mm 3x7/8 Speed Low-Clamp)
- A AKRAF Bike Link Plier + Chain Breaker Splitter Tool + Chain Checker + 3 Pairs Bicycle Missing Links, Bike Link Opener Closer Plier Chain Cutter Connector Wear Indicator Tool

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-24*