Joined in 2023 
82 
63 About this deal
Most newer bikes come with a steerer tube diameter of 1 and 1/8 in. Some mountain bikes come with 1.5 in. steerer tube and older bikes usually accommodate a 1 in steerer tube diameter only. Handlebar Clamp Diameter Fork steerer tubes are almost universally 1 1/8” at the top – even if the fork is 1.5” oversize at the fork crown – so most stem manufacturers don’t even quote this clamp figure.
A stem is the component that connects your handlebars to the frame of your bike. A threadless stem clamps around the steerer tube of your bicycle’s fork whereas a quill stem inserts inside the top of the fork steerer tube and is held in place internally. An adjustable stem allows you to easily alter the angle of your bike on the stem itself without having to replace the entire unit. Most new bikes come with threadless stems; however, some hybrids and a lot of older bikes have quill stems. Road cyclists have very different priorities to mountain bikers. Likewise competitive racers have different preferences to those who ride recreationally. Road Stems between 100-120mm of length are known as long stems and anything below 90mm is considered as short stems. Generally on a road bike stems tend not to be shorter than 90mm and longer than 130mm. Handlebar stems look like a fairly standard piece of equipment but have a massive influence on control and comfort. Get the wrong size stem and not only does reaching the bars become an issue but steering as well. Although this is a general outline, the stem length should be decided based on a complete bike fit. This depends on your torso length, arm length and flexibility. Take into account that frame size will play a large role in determining the correct stem length.
Truvativ Hussefelt Stem
Ideally, the stem should be long enough to shift some of the extra weight over to the front wheel to have stability over the steering and to improve grip on the road. Hence, longer stems are best suited for competitive racers who travel at high speed and need that kind of extra stability. NB: some manufacturers quote the other way ie 83° which in reality is a 7° rise so don’t expect a near vertical stem! Once you choose the appropriate type of stem for your bike, it is important to determine which clamp dimensions are compatible with your steerer tube and handlebars. Steerer Tube Clamp Diameter As a result, fine-tuning the stem can be one way to tweak the handling of your bike – but remember, your stem doesn’t exist in isolation and changing the stem length will also impact your position on the bike. Slowpoke wrote:I am trying to understand how to interpet the angle of a handlebar stem, and have a hard time with geometry.
would rise or drop 14 degrees if the steer tube were perpendicular. A "high rise" for some or "deep drop" for others. Leisure riders will appreciate a more upright, closer position as this more comfortable and easier to control. So stems no longer than 100mm and with 10 degrees or rise will be a good option for most. Older bikes have a 1” steerer but these are becoming rare and any stem to fit these types will be clearly labelled. If you are a regular rider, you may appreciate a neutral position with a slight rise in stem. Around 6 to 7 degrees of stem rise and a stem length that complements your position would suit you the best.Found on some mountain bikes and also some drop-bar machines such as Giant’s cyclocross bikes. 1 1/8in steerer, 35mm bar clamp
The only exception to this handlebar clamp size is the new Deda 35 system which is, you’ve guessed it, 35mm and needs a corresponding bar and stem. There’s no hard and fast rule for choosing a stem, it’s mainly whatever works best for you. Two identical riders with identical bikes may need a different stem so just make sure whatever you have works best for your needs.Most bar clamps are 4-bolt pattern which as well as being stiffer also helps spread out the pressure of the clamp across a greater area on the bar, which is something that carbon bar users will appreciate. Material
Great Deal 
New Comment