Brand product managers
Need a block they can build eight styles on, and a grade that holds across the whole size range.
Wants · one block, many styles
Riding-Fit Pattern Making: Why a Jacket Is Cut for the Rider on the Bike, Not the One Standing Still
A jacket that fits beautifully on a shop floor can ride badly ten minutes later: the hem rides up, the cuffs pull back off the wrists, the collar gapes at speed and the back armor slides off the joint over a bump. That is not a sewing fault. It is a pattern cut for a person standing with their arms down, worn by a person leaning forward with their arms out.
MotocrossMX12°
Sport / streetSport38°
ADV / touringADV8°
KartingKart52°Who reads this page: brands, teams, centres and anyone who has had a fit go wrong
Four readers who know that a fit problem found after bulk is the most expensive problem there is.
Team managers
Want jerseys that stay tucked and pants that do not pull at the knee through a whole moto.
Wants · fit that holds under load
Centres and academies
Fit a fleet to a hundred different bodies, so the middle sizes have to be right rather than average.
Wants · the middle of the run
Dealers
Return fewer garments when the size chart on the page matches what is actually in the box.
Wants · chart that matches the box
Standing position versus riding position: the four things that actually move
Four changes happen when a rider gets on a bike, and each one does something specific to a garment cut flat.
01
The torso leans forward
Cut flat → rides up at the hemThe back gets longer and the front gets shorter. A jacket cut for a straight back rides up at the hem and pulls across the shoulder blades.
02
The arms come forward
Cut flat → cuff pulls off the wristThe sleeve head rotates and the sleeve needs length on the outside of the arm. A standing-fit sleeve drags the cuff back off the wrist.
03
The knees bend past ninety
Cut flat → hem climbs the bootThe front of the thigh needs length and the back of the knee needs room. Pants cut straight pull the hem up the boot and bind at the knee.
04
The neck comes up
Cut flat → collar sits under the jawThe collar has to clear a helmet and sit against the neck with the head in the riding position, not looking straight ahead.
All four are permanentA rider does not spend the ride standing up straight. The pattern is built around the position they hold — which is why the "wrong" look on a hanger is the correct look on a bike.
The riding block: what it is and how one is built
A block is the base pattern a family of styles is built on — and ours are built in the riding position from the start
A block is not a garment. It is the base set of pattern pieces — body, sleeve, collar, front and back rise — that every style in a family is developed from, with no styling on it. Building one starts from the body measurements of the target size, adds the ease the discipline needs, then moves the whole thing into the riding position: back length extended, front shortened, sleeve pitched forward, knee broken at the angle the discipline sits at.
What goes into a block before any styling
Measurements and armorThe base measurements of the target size, and the armor that has to fit inside.
Ease, place by placeAt chest, waist, hip, bicep and thigh — each one its own number.
Seams clear of pocketsSeam positions that do not run across armor pockets or wear points.
Sleeve pitchThe single decision that separates a riding jacket from a fashion one.
How to check itAsk what position the block was drafted in, and what armor was in it. A block drafted flat and "adjusted later" is a standing block with a name change.
One block per discipline, because the positions are not the same
Four riding positions, four different blocks. A brand launching across two disciplines gets two blocks — not one block with a note on it.
Motocross and enduro
Position · standing as often as seatedThe most room through the shoulders and the shortest front, because the rider is upright and constantly moving.
Sport and street
Position · leaned over the tankThe longest back, the strongest sleeve pitch, and a collar that clears a helmet in a head-up position.
ADV and touring
Position · upright, arms outModerate pitch, the most room for layers underneath, and a length that works both seated and standing.
Karting
Position · seated, legs forwardA short rise at the back, a deep knee break, and shoulders cut for a steering wheel rather than a handlebar.
On a bike
with armor in
with armor in
A fitting on a mannequin proves nothing about a garment that will be worn at a forward lean.
The same jacket in two positions is not the same jacket
Scroll: the rider folds into the riding position, and the two measurements that decide whether the jacket works go with them.
Why the hanger look is the wrong test
A riding-fit jacket looks slightly long in the back and slightly forward in the sleeve on a hanger. That is the pattern doing its job: the extra back length disappears the moment the rider leans, and the forward sleeve straightens out as soon as the arms reach the bars. Judged flat, it looks wrong. Judged on the bike, it is the only one that stays where it should.
- The hem should still cover the back when the rider is leaned forward, not just when they are standing.
- The cuff should still reach the glove with the arms out, not drop two centimetres short of it.
How to check itTry the sample on and get into the position — on the bike if you can, or leaning on a chair back if you cannot. A jacket judged standing up has not been judged.
+9% BACKBack length needed once the torso is leaned forward
+6% SLEEVEOuter sleeve length needed once the arms reach the bars
0% ON A HANGERNeither of them shows up until the rider is in position — which is why a flat judgement fails
Fitted on a bike, with armor in, by people who ride
Every construction sample is fitted on a real person, on a bike, with the armor in its pockets — and the same set of points is checked every time.
- Hem at the backWhere it sits once the rider is leaned forward, not standing.
- Cuff at the wristWith the arms out to the bars and the gloves on.
- Collar at the neckWith the helmet on and the head in the riding position.
- Armor over the jointThrough the full range, including a knee coming all the way up.
Marks go back as pattern correctionsNot as sewing instructions. The second sample comes from a corrected pattern — not from the same pattern sewn more carefully.
How to check itAsk for the fitting photos on the bike. A fitting shot of a garment on a stand is a photograph of a hanger fit.
4BLOCKSOne per riding position
4FIT POINTSChecked at every fitting
XS–4XLGRADEDEach measurement, own increment
1SIZE SHEETTravels with the order
Armor position is set on the block, not at the sewing machine
Armor that moves off the joint under load is a pattern problem, and it is solved at the block
Pockets at shoulder, elbow, knee and back only stay over the joint if the panel they are sewn into stays in place when the rider moves. So the pocket position is set on the block in the riding position, the seams around it are placed so they do not run across it, and the panel is shaped so the pocket sits on the outside of a bend rather than being dragged around it.
- Pocket position set on the block, in position — not added to a finished panel.
- Seams routed around the pocket, so no seam crosses the pad.
- Panel shaped so the pad sits on the outside of the bend, where the joint actually goes.
How to check itPut the armor in, get on a bike, and have someone look at where the pads actually are — with the knee all the way up.
Grading: making the size run right, not just bigger
A size run is not one pattern scaled up. Each measurement grows by its own increment, because a body two sizes up is not a uniformly larger version of the same body.
| Measurement | How it grows | Scale one pattern up and… |
|---|---|---|
| Its own increment | Fine at the sample size, tight at the top of the run. | |
| Grows slower than chest | A 4XL collar you could fit a second neck into. | |
| Grows slower than body | An XS with a sleeve off a different garment. | |
| Changes differently again | Pants that ride down exactly where a rider leans forward. | |
| Tied to the armor, not the chest | Armor that no longer fits its own pocket at the ends of the run. |
Where a bad grade shows firstAt the ends of the run, where a wrong increment compounds — and in the middle, where most of your order actually sits. A grade checked only at the sample size will pass a sample and fail a batch.
The size-run set: the whole range tried on real people before bulk
One garment per size, on real bodies, in the gear they ride in — the last gate before the line starts
Comments are collected per size, not as one average. Before bulk, one garment per size is made and tried on real people with the kit they actually ride in: base layers, armor, boots. Any correction goes back into the graded pattern before the line is released.
- What comes out of it is a signed size sheet, and that sheet travels with the order.
- On the floor, the first piece of every size is measured against that sheet before the size is released.
How to check itAsk whether the size run was tried on or only measured. A tape on a table does not catch a sleeve that is right on paper and wrong on an arm.
What the sheet does after it is signedIt travels to the floor with the order. The first piece of every size is measured against it before that size is released to the line, and a size that measures off is corrected on the pattern or the machine setting before a second piece is sewn.
Start from a block
Tell us the discipline and the armor, and we will tell you which block it starts from
RaceClosest to the body, cut for one position and little underneath.
StandardThe middle setting: a base layer, armor in, a full range of movement.
TouringThe most room: layers underneath, long days, both seated and standing.
How to check itAsk for the ease at chest, waist and bicep for the fit you want, and compare it to the sample you already like.
Ease: the number that separates a riding fit from a tight one
Ease is deliberate room, and every discipline has its own amount in each place
Ease is the difference between the body measurement and the garment measurement. It is not slack, it is designed room: for the armor, for the layers underneath, for the movement the position demands, and for the material's own behaviour. It is also where a fit brief gets specific — "race fit" and "touring fit" are not adjectives here, they are different ease numbers at chest, waist and bicep on the same block.
- Leather1.1–1.3 mm cowhide relaxes as it is worn, so it is drafted with less.
- Laminate shellDoes not move at all, so the pattern has to provide every bit of the movement.
- 4-way stretch panelCarries the movement itself, which lets the panels around it be cut close.
- 600D polyesterStable but stiff; ease goes where the knee and elbow bend.
The pattern archive: why your second order fits like your first
Blocks, corrections and graded sets are kept by name — so a repeat is a cut, not a redevelopment.
The block
Yours, with the discipline, the armor and the ease it was built with written on it.
The correction history
Every fitting change that was made and why, so a change is never quietly undone later.
The graded set
The full size range as approved, with the grade rules kept beside it rather than derived again.
The signed size sheet
What the size run was approved at — and what production measures the first piece of each size against.
Fit corrections, and what each one costs in days
Which corrections are free, which need a new sample, and which have to happen before bulk.
Fit comment before the construction sample is approvedCorrected on the pattern while the sample is still open
Noneno effect
Fit comment after approval, one size onlyCorrected on the graded set for that size
Onesize-run piece
Fit comment that affects the blockThe grade is re-issued from the corrected block
Newcore-size sample
A new discipline added to the rangeA new block developed from the base measurements
15–20days sample
Armor changed after fittingPocket position re-checked on the pattern
Newif pad size changed
Repeat order from the archiveCut from the approved graded set
Noneno new sample
Fit brief: the six things to send
Send these six and Anna comes back within 24 hours on business days with the block it starts from.
The discipline and position
Motocross, sport, ADV or karting; it decides the block.The garment and material
A leather suit, a laminate shell and a mesh jacket are drafted differently.The armor
What goes in the pockets — or that there is none.Your size chart, if you have one
Or the sample you want the fit compared to.The fit you want
Race, standard or touring — in ease numbers if you have them, in a reference garment if not.The size range and quantities
So the grade is built for the run you are actually making.
The pages either side of the pattern room
Where a block goes next, and where the garments it produces live.
Discipline, garment, armor
Send the discipline, the garment and the armor, and we will tell you which block it starts from
Anna replies within 24 hours on business days with the block it starts from, whether an existing one can be used, and what the fit route looks like from there to a signed size sheet.
Anna · Sales Manager
WhatsApp / phone: +86 177 0272 7677
Email: sales@runmotoapparel.com
Mon–Sat 9:00–18:00 (GMT+8)