---
product_id: 343199109
title: "TRIWONDER Bike Stem 31.8mm 7 45 Degree MTB Stem Riser Aluminium Alloy Bicycle Handlebar Extender for Mountain Road Bike BMX"
brand: "triwonder"
price: "€ 3490.54"
currency: EUR
in_stock: true
reviews_count: 7
url: https://www.desertcart.fi/products/343199109-triwonder-bike-stem-31-8mm-7-45-degree-mtb-stem
store_origin: FI
region: Finland
---

# 31.8mm handlebar diameter - universal fit ±45° adjustable angle - customizable comfort 6061 aluminum alloy - lightweight & durable TRIWONDER Bike Stem 31.8mm 7 45 Degree MTB Stem Riser Aluminium Alloy Bicycle Handlebar Extender for Mountain Road Bike BMX

**Brand:** triwonder
**Price:** € 3490.54
**Availability:** ✅ In Stock

## Summary

> 🚴‍♂️ Elevate your ride, own the trail — comfort meets control!

## Quick Answers

- **What is this?** TRIWONDER Bike Stem 31.8mm 7 45 Degree MTB Stem Riser Aluminium Alloy Bicycle Handlebar Extender for Mountain Road Bike BMX by triwonder
- **How much does it cost?** € 3490.54 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/343199109-triwonder-bike-stem-31-8mm-7-45-degree-mtb-stem)

## Best For

- triwonder enthusiasts

## Why This Product

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

## Key Features

- • **Effortless Installation:** Simple bolt-on design ensures quick setup without the need for specialized tools.
- • **Universal Compatibility:** Fits standard 31.8mm handlebars and 28.6mm fork stems, perfect for road, mountain, and BMX bikes.
- • **Customizable Riding Posture:** Adjustable ±45° angle lets you fine-tune handlebar height for optimal comfort and control.
- • **Lightweight Performance Upgrade:** At just 238g, it enhances your bike’s ergonomics without adding bulk.
- • **Precision Engineered Durability:** Crafted from premium 6061 aluminum alloy for corrosion resistance and long-lasting strength.

## Overview

The TRIWONDER Bike Stem is a lightweight, corrosion-resistant handlebar extender made from durable 6061 aluminum alloy. Designed to fit 31.8mm handlebars and 28.6mm fork stems, it offers a ±45° adjustable angle to customize your riding posture. Ideal for road, mountain, and BMX bikes, it installs easily and weighs only 238g, making it the perfect upgrade for enhanced cycling comfort and control.

## Description

TRIWONDER Bike Stem 31.8mm 7 35 45 Degree MTB Stem Riser Aluminium Alloy Bicycle Handlebar Extender for Road Mountain Bike BMX

## Features

- 🚴‍♀️【MATERIAL】Made of 6061 aluminum alloy, the bike stem extender is lightweight, corrosion resistant and durable
- 🚴‍♀️【DIMENSIONS】Handlebar diameter: 31.8mm (1.25''). Front fork stem diameter: 28.6mm (1-1/8"), Length: 90mm (center distance of the two holes)，Weight：238g
- 🚴‍♀️【ADJUSTABLE ANGLE】+/- 45 degree. Help to up or down the height of handlebar and make your cycling more comfortable
- 🚴‍♀️【EASY INSTALLATION】Just connect up the original front fork stem, adjust the angles and tight all the bolts to holds bar firmly
- 🚴‍♀️【APPLICATION】The bike handlebar stem is suitable for most road bike, fixed gear bicycle, mountain bikes, BMX, etc

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Bike type | Road Bike, Mountain Bike |
| Color | 45° - 31.8 x 90 mm |
| Size | 31,8 x 90 mm |
| Material type | Aluminium |
| Sport | Cycling |
| Batteries included? | No |
| Brand | TRIWONDER |
| Manufacturer | TRIWONDER |
| Item model number | 09280928 |
| Product Dimensions | 9 x 3.18 x 0.1 cm; 226.8 kg |
| ASIN | B0953LW2XJ |

## Product Details

- **Colour:** 45° - 31.8 x 90 mm
- **Brand:** TRIWONDER
- **Bike type:** Road Bike, Mountain Bike
- **Manufacturer:** TRIWONDER

## Images

![TRIWONDER Bike Stem 31.8mm 7 45 Degree MTB Stem Riser Aluminium Alloy Bicycle Handlebar Extender for Mountain Road Bike BMX - Image 1](https://m.media-amazon.com/images/I/61XIz3chXxL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good value
*by H***Y on 5 March 2025*

Does what it should at a great price

### ⭐⭐⭐⭐ Decent Budget Stem
*by J***N on 8 September 2021*

Good price for what looks like a good budget stem, it's quite light in weight and has a nice finish, how strong this is I can not say but for anything other than hard off road use it should be plenty strong enough, I have been trying out a very similar stem, although be it shorter, and it's not had any problems so I can not see this being any different, four bolts on the handle bar clamp and two fixed in opposite directs on the steerer tube end, this though is where for me it's loosing a star one of the bolts was missing, I checked all the packaging and the floor but could not find it so I think it was just one of those problems that happen now and then at the factory luckily I have loads of stem bolts so can fix this.

### ⭐⭐⭐⭐⭐ Stem
*by M***T on 19 May 2024*

Good product 45% justs makes your seated position a bit more upright

## Frequently Bought Together

- TRIWONDER 31.8 Bike Stem 45 Degree 90mm Bicycle Handlebar Stem Riser Bar Clamp MTB Stem for Road Bike Mountain Bike BMX
- ZUKKA Bike Stem Quill Adapter, Bicycle Fork Stem Riser Extender 22.2/25.4 mm to 28.6mm for 1-1/8" Threadless Size Converter

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**Shop now:** [https://www.desertcart.fi/products/343199109-triwonder-bike-stem-31-8mm-7-45-degree-mtb-stem](https://www.desertcart.fi/products/343199109-triwonder-bike-stem-31-8mm-7-45-degree-mtb-stem)

---

*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-02-28*