Handlebars, Grips and Cockpit

The four numbers on a set of bars

Bars get sold on rise. That is the number in the listing title, and for a lot of riders it is the only one they look at. It is also the reason people buy bars that match on paper and then cannot get comfortable on them.

Think of the bars as one shape rather than four separate specs. Rise is how high the grip area sits above the clamp area. Width is how far apart the two ends are. Backsweep is how far the ends are angled back toward the rider. Upsweep is how far the ends tilt up out of the plane the bar sits in. Every one of those changes where your hands end up, and three of them change where your hands end up when you alter one of the others.

The interaction people miss is rotation. Because a bar has backsweep, rolling it forward or back in the stem does not just tilt the grips, it moves them. Roll the bars forward and the grips travel down and away from you, so you lose effective rise and gain reach. Roll them back and the grips come up and toward you, so you gain effective rise and lose reach. A set of bars is not one position, it is a small range of positions, and the amount of backsweep decides how wide that range is. Bars with a lot of backsweep change a lot as you rotate them. Bars with very little change hardly at all.

The second interaction is cutting. Trimming the ends of a swept bar takes width off, but because the ends are swept back and up, it also brings the grips very slightly down and forward. Nobody notices a small trim. Take a lot off and you have changed three numbers, not one.

That table has no figures in it on purpose. It describes the shape of the effect, which is well understood and does not need a source. The numbers themselves need one, and they are in the table below with their sourcing.

Rise is where the choice really lives, spanning three inches across the market. The other three barely move: upsweep sits inside a degree and a half across every brand checked, and freestyle backsweep inside two degrees. If you are comparing bars, rise and width are the numbers doing the work.

Two bars quoting the same rise are not necessarily the same height

Brands do not measure rise from the same place. Most freestyle makers measure from the clamp tube centre to the centre of the grip area. Some measure to the outer top wall of the tube instead. On a 22.2mm tube that is a difference of one tube radius, about 11mm, or nearly 0.44 inch.

So two bars both sold as 9.0 inch rise can stand almost half an inch apart in real height, and neither maker is lying. This is the single most useful thing on this page. Do not compare rise figures between brands and expect them to mean the same thing, and if you are replacing bars with the same rise from a different maker, expect the cockpit to feel different.

It is also why the diagram above measures rise to the top of the tube and says so, rather than quietly picking one convention.

Handlebar rise

Taller bars put your hands higher and slightly further back, which makes the front end feel lighter and makes lifting the front wheel less work. Lower bars put more weight over the front, which most riders read as more stable and more planted, particularly at speed.

There is no correct rise. Height helps a bit, riding style helps more, and habit probably beats both. Somebody who has ridden the same rise for years will find a change of even a small amount obvious for a week and then stop noticing. That is worth knowing before you decide bars were the problem.

What matters more for buying is that rise is not the only thing setting your hand height. Stem stack height, headset spacers, fork steerer length and the bars' own backsweep all move your hands as well. If you fit bars with the rise you always run and they still feel low, look at what changed underneath them before you buy taller ones.

Handlebar width

Wider bars give more leverage over the front wheel and open the chest up. Narrower bars turn faster for the same hand movement and get through tighter gaps. Riders who spin bars often prefer them a little narrower simply because there is less bar to swing.

On used bars, width is the spec to treat with suspicion. A cut set is not a fault as long as the cut is clean and square and both sides match, but it does mean the listed model width is no longer the width you are buying. Measure a used set rather than trusting the model name. Uneven cuts are more common than people expect, and a bar that is a few millimetres longer on one side than the other will always feel slightly off centre no matter how carefully you line the stem up.

Backsweep and upsweep

Backsweep is the number nobody quotes and everybody feels. Two sets of bars with the same rise and width, one with a lot of sweep and one with very little, put your wrists at genuinely different angles. If bars feel wrong in a way you cannot describe, and the rise and width both check out, sweep is usually the answer.

It is also the number that makes bar rotation useful. Because the ends are swept back, rotating the bar in the stem swings the grips through an arc rather than just tipping them. That is free adjustment, and it is worth using before spending money. Set the bars, ride them, then move them a small amount at a time rather than making one big change.

The practical consequence for buying used: rotation means a set of bars close to what you want can usually be made to work, so do not rule out bars whose rise is slightly off. Rotation cannot fix width, and it cannot fix sweep.

Upsweep

Upsweep is the angle the ends rise out of the plane the rest of the bar sits in. On its own it is the smallest of the four effects, which is why plenty of riders have never thought about it. Where it becomes noticeable is stacked with a lot of backsweep, because the two together decide how the grip sits under your palm rather than just where it sits in space.

If you have ever fitted bars that measured right and still felt like they were pushing your hands outward, upsweep is a good candidate.

The ranges are in the table above: 10 to 12 degrees of backsweep on freestyle bars, 1.5 to 3 degrees of upsweep, with flatland bars running much straighter at 3 to 6 degrees back.

On how sweep is quoted, the news is good, and it is the opposite of the rise problem. Every source checked quotes sweep per side, as the angle each grip section deviates from the clamp axis. So a bar listed at 12 degrees backsweep has each end swept back 12 degrees, not 12 degrees total across both. No brand was found using an included-angle convention.

That means sweep figures can be compared between brands, which is worth knowing because almost nothing else on this page can be.

Two-piece, three-piece and four-piece bars

A two-piece bar is a single bent tube with a crossbar welded in. Bending gets you a certain amount of rise before the tube starts to suffer, so two-piece bars tend to sit at the shorter end.

A four-piece bar splits the job up. The uprights are separate pieces welded to the crossbar and to the clamp section, so the maker is not limited by how far a tube can be bent. That is how taller bars are built, and it is why four-piece became the normal thing on freestyle bikes as bars got taller.

Three-piece and other counts exist and are exactly what the name says, an intermediate arrangement of the same idea.

The point people get wrong is treating piece count as a strength rating. A weld is not automatically a weak point and a bend is not automatically a strong one. A bend work-hardens and thins the tube on the outside of the curve. A weld adds a heat affected zone. Both are places a bar can fail, and which one fails first depends on the tubing, the butting and the quality of the welding, not on the number in the name. Buy on the maker's reputation and on the condition in front of you rather than on piece count.

The crossbar

The crossbar ties the two uprights together and stops them flexing independently. On a two-piece bar it is doing that job for a single bent tube, on a four-piece it is a structural member the uprights are actually welded to.

Crossbar height, meaning how far up the bar it sits, varies between models and changes what the bars look like more than what they do. It matters for one practical reason: anything you mount on the bars has to live around it. A brake lever, a gyro cable, a phone mount or a number plate all need somewhere to go, and a high crossbar takes some of that room away.

Bar clamp diameter

This is the one genuine fitment question on the whole page. Rise, width and sweep are preferences. Clamp diameter is pass or fail.

If the faceplate on a front load stem will not pull down evenly, or the bar spins in a tightened top load stem, stop tightening. Over-torquing a stem to hold an undersized bar crushes the clamp area, marks the bar, and can crack the stem. Shim kits exist for running a smaller bar in a larger clamp, and they are a legitimate fix when they are the right shim and not a strip of tin.

Going the other way, a larger bar simply will not go into a smaller clamp, and no amount of persuasion makes that a good idea.

22.2mm is a rounded name. The exact figure is 7/8 inch, which is 22.225mm, so a caliper reading 22.22 on a used bar means the bar is standard, not worn. Nothing rides on the extra hundredth of a millimetre, but knowing it stops you second-guessing a good bar.

Oversize at 25.4mm is offered by S&M and Eclat, so it is current rather than dead, but it is a deliberate choice rather than something you end up with by accident. An oversize bar needs an oversize stem. The two clamp diameters do not mix, and the gap between them is 3.2mm, which is far too much to force.

Shims exist, from named makers. Eclat sell a 25.4mm to 22.2mm handlebar shim set, and Problem Solvers make handlebar reducer shims for the same job. These are split aluminium sleeves with a 25.4mm outside and a 22.2mm inside, made to hold a standard bar in an oversize clamp without slipping. Confirmed

Worth saying because the alternative people reach for is packing the gap with a strip of drink can or a wrap of tape. Do not. A bar clamp works by even pressure around the tube, and a shim that is not a proper sleeve gives you a bar that creeps under load and a clamp face that scores the bar. The parts cost a few pounds and they are the difference between a safe fix and a bar that rotates on a hard landing.

Note this only goes one way. A shim lets a standard bar run in an oversize clamp. Nothing lets an oversize bar into a standard clamp.

Knurling and clamp condition

The knurled band in the middle of a bar is a roughened patch that helps the stem grip without needing to be crushed onto the tube. It is also the best condition tell on a used set of bars.

Knurling that is worn smooth in a band, or shows a clear polished ring, has had a stem slipping on it or has been clamped and unclamped a lot. Neither is fatal by itself. What you are actually looking for is any dent, flat spot, ovalling or crack in the clamp area, because that is where the stem loads the bar hardest and where an over-tightened stem does its damage. Run a fingernail across it. Sight down the bar from the end.

If a used bar is marked in the clamp area badly enough that the stem sits on a step rather than on a round tube, it does not get sold. That is the sort of part that fails without warning.

Bar material and butting

A butted tube has different wall thicknesses along its length. The ends and the joints, where the stress concentrates, get more material. The middle of a span, where there is less going on, gets less. That is how a bar can be lighter than another bar without being weaker in the places that matter.

You will see butting described in listings as double, triple or quad butted, meaning the number of distinct wall thicknesses along the tube. The trap is that this is a marketing term as much as an engineering one. A quad butted bar from a maker who does it properly is a genuinely good part. The same words on a bar with no named tubing behind them mean whatever the seller wants them to mean. The words on their own are not a spec.

For a used buyer, the honest position is that you cannot see butting from outside the tube and you cannot weigh it out of a listing photo. What you can do is buy on the maker, check the clamp area and the welds, and treat unbranded bars with no model name as an unknown.

Aluminium BMX bars exist and are unusual. If a set of bars is noticeably light in the hand and does not attract a magnet, that is worth knowing before you fit pegs to the front wheel and start putting the bike through what a steel bar is expected to take.

Grips, flanges and barends

A flange is the raised collar at the inboard end of a grip. It stops your hand sliding inward and it gives a definite edge to locate against. Flangeless grips leave the bar clean, which riders who move their hands around or who mount things close to the grip usually prefer. This is preference, not fitment, and riders are firm about it in both directions.

Grip length matters more than people expect on a cut set of bars, because a long grip on a short bar end leaves nowhere for a brake lever. Check the lever position before deciding a grip is too long, not after.

Barends

The open end of a handlebar is a small circular cutting edge, and it is the single most avoidable injury on a BMX bike. Barends are not optional. Alloy barends wedge into the tube and are the normal fitting. Plastic push-in ends do the same job more cheaply. Grips with a moulded closed end are also fine as long as the end is genuinely closed and not just a thin skin.

A used bike with no barends fitted has been ridden with no barends fitted, which is worth remembering when you are judging how the rest of it was looked after.

Grips fit one diameter and that makes life simple. BMX bars are 22.2mm at the grip area, the same 7/8 inch as the clamp section, and no current bar was found using anything else. Even oversize 25.4mm bars taper back down to 22.2mm where your hands go, because the oversize is about clamping strength at the stem, not about the grips. So any BMX grip fits any BMX bar. Confirmed

Grip length is less tidy.

Flanged grips are often quoted overall, including the flange, which eats 3 to 5mm of the space your hand actually gets. Flangeless grips are more often quoted as usable sleeve length. So a 160mm flanged grip and a 160mm flangeless grip do not give you the same amount of grip, and the difference goes the wrong way from what the number suggests.

Same lesson as the rise figures further up this page: the number is reliable, what it is measuring is not.

Stems and where they put the bars

The stem is the other half of the cockpit and it moves your hands as surely as bar rise does. Two things about it matter for fit: how far forward it puts the bars, and how much height it adds under them.

Front load is the convenient one. Undo the faceplate bolts and the bars lift straight out, so swapping bars does not mean stripping grips, levers and gyro cables off. Top load usually stacks a little taller for a given model, which riders who want maximum hand height use deliberately.

If you are chasing a specific hand position, remember the stack adds up: fork steerer length, headset, spacers, stem, then bar rise. Changing the stem changes the same total that changing the bars does. That is why the honest advice on a cockpit that feels wrong is to work out which part of the stack changed rather than immediately buying taller bars.

When you refit bars, tighten the faceplate bolts evenly in a cross pattern and leave an even gap top and bottom. A faceplate pulled down hard on one side first is how clamp areas get marked and how faceplates crack.

Questions

Measure what your grip and lever actually need and leave that, rather than working to a number nobody publishes. :::

Two-piece bar

Look at where the uprights meet the bottom section. On a two-piece the tube runs through in a continuous bend. It is both a construction difference and a rough era marker, and it changes how the bar flexes under load.

Four-piece bar

The joints are what to inspect on a used set. Cracks start at weld toes, so look closely where the uprights meet the crossbar and where they meet the bottom section, particularly on a bar that has taken a hard front-end hit.

Crossbar

A bent or dented crossbar means the bar has taken a serious impact and should be retired rather than straightened.

Lock-on grip

Worth checking against your bars before buying, because a bar with a short straight section at the ends may not leave room for the clamp. They also need end plugs; the collar does not close off the bar end on its own, and an open bar end is a real hazard in a crash.