11/11/2026
John Deere 317G tracks are listed in two sizes, 320 x 86 x 50B and 400 x 86 x 50B: 320 mm (12.6 in) or 400 mm (15.7 in) wide, with an 86 mm pitch and 50 links. How to measure them, confirm the fit and check the undercarriage parts around them.
Looking for John Deere 317G tracks or John Deere 317G rubber tracks? Our catalog lists two track sizes for this machine. They share the same pitch and link count and differ only in width. This guide gives the John Deere 317G track size, how to measure and check the fit, the signs that tracks are worn and the undercarriage parts worth checking while the tracks are off.
The short answer
Our catalog lists the John Deere 317G rubber track in two widths. Pitch and link count are the same for both, so the choice comes down to width.
| Track size | Width | Pitch | Links | Tread | Sold as |
|---|---|---|---|---|---|
| 320 x 86 x 50B | 320 mm (12.6 in) | 86 mm | 50 | C-lug | Per track |
| 400 x 86 x 50B | 400 mm (15.7 in) | 86 mm | 50 | C-lug | Per track |
Source: Excavator Parts Direct catalog, November 2026. Sold as a single track (price is per track). Two tracks per machine.
Read the size as width x pitch x links. A 320 x 86 x 50B track is 320 mm wide, has 86 mm between link centers and has 50 links. The letter after the link count denotes the tread or guide type, so match it to the size on your old track.
If the size is still readable on the side of the old track, use it. If it has worn away, take three measurements:
Width
Measure across the track from edge to edge. A John Deere 317G track should measure 320 mm (12.6 in) or 400 mm (15.7 in).
Pitch
Measure from the center of one link to the center of the next. Measure over several links and divide, which gives a truer figure than a single gap. Both 317G sizes have an 86 mm pitch.
Links
Count the drive lugs around the inside of the track. Mark your starting lug with chalk so you do not count one twice. Both 317G sizes have 50.
If your pitch and link count come out at 86 and 50, the width tells you which size to order. The link count is the figure most often miscounted, so count twice. Our guide to measuring rubber tracks shows each step with diagrams.
Confirm the model
Read the model plate. Model codes can differ by a single character, and each model has its own listing in our catalog. Order from the listing that matches your plate, and if the plate is hard to read, send us the serial number.
Match the width
Order the width the machine runs on now, and fit the same width on both sides. If the old tracks are missing or the size has worn away and you are not sure which width the machine should take, ask us before you order.
Check the pitch and links
Compare your measurements with the table above. If the pitch is not 86 mm or the link count is not 50, stop and check before you order.
Look underneath first
Before the new tracks go on, inspect the sprockets, idlers, rollers and track adjuster. New tracks on a worn undercarriage wear out sooner.
Our advice
A size that is checked, not guessed, is the quickest way back to work. If anything does not match, talk to the team before you order, so you maximize machine uptime and avoid a return.
These are the checks we recommend on any tracked machine, and they apply to the 317G.
Deep cuts, missing lugs and steel cords showing through the rubber all mean the track is near the end of its life. A track in that state can fail without much warning, so plan the change before it does. Check the inside face too, where the drive lugs meet the sprocket.
If the track keeps going slack after you adjust it, do not assume the track is the cause. A track adjuster with failed piston seals cannot hold tension, and worn sprockets can add to the problem. Here is how to check rubber track tension. The correct tension figure for the 317G is in your machine’s operator’s manual.
When sprocket teeth wear sharp, they stop holding the track cleanly. The track can slip or jump through the sprocket, and the shock load travels into the final drive. If you see or hear this happen, stop and inspect the sprockets before you carry on.
If tracks wear out well before the last set did, check the parts underneath before you fit new ones. Material packing between sprocket teeth, rollers and the track also speeds up wear, so keep the undercarriage clean. Spinning the tracks, unnecessary reversing, high travel speed when it is not needed and always turning in the same direction all add wear too. These five tips to extend rubber track life cover other common causes.
With the tracks off, the whole undercarriage is in plain view. That makes a track change the best time to inspect it. Here is what to look at, and what our catalog lists for the 317G today:
| Part | What to check | Listed online for the 317G |
|---|---|---|
| Rubber tracks | Cuts, missing lugs, exposed cords, tension that will not hold | Yes: 320 or 400 x 86 x 50B, C-lug, per track |
| Drive sprockets | Teeth worn sharp, track slipping or jumping | Not currently listed. Ask the team |
| Idlers | Worn running surfaces, damaged flanges, oil leaks, play | Not currently listed. Ask the team |
| Rollers | Flat spots, worn flanges, oil leaks, rollers that do not turn | Not currently listed. Ask the team |
| Track adjuster | Track that will not hold tension, grease leaks | See the Track Adjusters range |
Source: Excavator Parts Direct catalog, November 2026.
The sprocket bolts to the final drive and its teeth engage the track to drive the machine. Sprocket wear is hard to judge by eye, so compare yours with an unused sprocket of the same type. Wear builds faster in reverse and at higher travel speeds. We do not currently list a 317G sprocket online. Browse John Deere sprockets or contact us with the serial number. Our guide to spotting a worn sprocket shows what to look for.
Idlers guide the track around the ends of the track frame and work with the track adjuster to hold tension. Check for worn running surfaces, damaged flanges, oil leaks and play. With an idler off, it is also the easiest time to check or replace the track adjuster. Our guide to how track adjusters work explains the common faults. See John Deere idlers for the John Deere idlers we list.
Rollers carry the machine’s weight on the track. Look for flat spots, worn flanges, oil leaks and rollers that no longer turn, and check every one, including the rollers that are hard to see. We advise changing rollers as a set, because a single new roller sits proud of the worn ones and wears faster. Our guide to bottom rollers and carrier rollers explains the difference, and the John Deere track rollers and John Deere carrier rollers pages show what we list.
Our advice
If the sprockets, idlers or rollers show wear, replace them with the tracks. It is one job and one round of downtime, and the new tracks start on a sound undercarriage. If a part you need is not listed, contact us with the serial number and we will check.
Our catalog lists the John Deere 317G rubber track in two widths, both with a C-lug tread. All of our John Deere tracks are on the John Deere rubber tracks page.
More John Deere parts
Our catalog lists two track sizes for the John Deere 317G: 320 x 86 x 50B and 400 x 86 x 50B. Both have an 86 mm pitch and 50 links. The only difference is the width: 320 mm (12.6 in) or 400 mm (15.7 in).
We list John Deere 317G tracks in two widths: 320 mm (12.6 in) and 400 mm (15.7 in). Measure the track on your machine, or read the size on its side, and order the same width.
It is the track size, written width x pitch x number of links. The track is 320 mm wide, measures 86 mm from the center of one link to the center of the next and has 50 links. The letter after the link count denotes the tread or guide type, so match it to your old track.
Order the width your machine runs on now, and fit the same width on both sides. If the size on the old track cannot be read and you are not sure which width the machine should take, send us the serial number and we will check.
Yes. We sell John Deere 317G tracks individually, and the price shown is for one track. The machine takes two, one on each side.
Both 317G sizes in our catalog are listed with a C-lug tread. If you need a different tread, send us a photo of your old track and we will confirm what we can supply.
Our catalog lists the John Deere 317G rubber track in two widths. We do not currently list a 317G sprocket, idler or roller online. Contact us with the machine’s serial number and the parts you need, and we will check what we can supply.
The correct tension figure and method for the 317G are in your machine’s operator’s manual. As a rule, a track that is too loose can come off, and a track that is too tight wears faster, along with the parts it runs on.
Common signs are deep cuts, missing lugs or steel cords showing through the rubber, a track that will not hold tension, a track that slips or jumps on the sprocket, and tracks that wear out much faster than the last set. Check the sprockets, idlers, rollers and track adjuster at the same time.
Related guides
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