OTR Tyre Repair Decision Tool
OTR tyre damage?
A second opinion you can trust.
Whether you've had a patch failure, you're new to OTR, or you're sizing up alternatives to your current supplier, this short assessment gives you a technically grounded recommendation in minutes.
What brings you here?
Quick context, so we can route your message to the right person on our team.
What is the tyre construction?
What is the rim size?
Select the rim diameter range from your tyre's sidewall marking. This determines both the A-B non-repairable zone limit and the maximum repairable crown injury size.
Where is the injury on the tyre?
Select all that apply, a single incident can cause damage in more than one zone.
Select one or more
What type of injury is present?
Select the injury type for each affected zone. This determines whether repair is structurally safe.
What is the cord condition at the injury?
Inspect the prepared injury area. Cord condition is a primary factor in whether repair is structurally safe.
How far is the injury from the bead base?
Measure from the bead base (point A) to the centre of the injury on the inside of the tyre. The A-B limit for your rim size will be checked automatically.
mm
A-B non-repairable limits (Blackstone standard)
14.00"–16.00" → 75 mm · 15.5"–20.5" → 75 mm · 18.00"–21.00" → 125 mm
23.5"–26.5" → 125 mm · 24.00"–27.00" → 125 mm · 26.5"–33.5" → 150 mm
30.00"–37.00" → 150 mm · 37.25"–37.50" → 255 mm · 40.00"–45.00" → 255 mm
If rim size is not yet known, select the closest range, it can be corrected at the next step.
23.5"–26.5" → 125 mm · 24.00"–27.00" → 125 mm · 26.5"–33.5" → 150 mm
30.00"–37.00" → 150 mm · 37.25"–37.50" → 255 mm · 40.00"–45.00" → 255 mm
If rim size is not yet known, select the closest range, it can be corrected at the next step.
What is the tyre's ply rating?
Find the ply rating on the tyre sidewall (shown as "** PR" or as a load range). This selects the correct bias / cross-ply patch from the Blackstone selection matrix.
What is the prepared injury size?
Enter the largest dimension of exposed body ply after preparation, not the surface cut size. This determines the correct patch.
Round injury, like a puncture? Enter the length only and leave width blank. For a cut, enter both length and width.
mm length
mm width
Optional, radial patches are sized in both directions. Enter the width measured across a cut.
Measure after buffing and preparation. For crown punctures, this is the hole diameter at the widest point of exposed cord. For cuts, measure the longest dimension of exposed body ply.
Has this tyre been repaired before?
Previous repairs affect structural integrity, especially if overlapping with the current injury.
How much tread life remains?
Remaining tread depth affects whether repair is economically worthwhile, even when technically possible.
Has the tyre been run flat or significantly underinflated?
Run-flat operation causes internal sidewall damage that is often invisible from outside the tyre.
What is the operating environment?
This helps us understand where our patches are being used and how OTR tyres are damaged across different site types.
Disclaimer
This tool provides a preliminary assessment based on information entered by the user and general OTR tyre repair standards. It is intended as a decision-support guide only and does not constitute professional engineering or tyre inspection advice. Blackstone Rubber accepts no liability for repair decisions made on the basis of this output. All repairs must be carried out by a qualified tyre technician following applicable industry standards and the manufacturer's repair guidelines. Final repairability determination must be made by an on-site professional after physical inspection of the tyre.
A direct line for your OTR questions
We'll email you a written copy of this assessment and connect you with a senior contact at Blackstone.
✓ Thanks. You'll hear from us within a working day, personally, by reply email.
About the manufacturer
Blackstone Rubber is a dependable quality OTR tyre patch manufacturer based in Jodhpur, India. We have been manufacturing and exporting OTR patches since 1985, supplying quarries, mines, and construction sites across more than 25 countries. This tool exists because the repair-or-replace decision is too often made on gut feel. It should be made on criteria.
If your assessment shows the tyre is repairable, the patches recommended above are manufactured by us, for all OTR sizes from 14" to 45".
Website
Phone / WhatsApp
OTR Catalogue
About Us
The company had its inception in the year 1985, with the aim to serve Earth Moving Tyres users in the area when there was no presence of such concept in Rajasthan. We have grown from Tyre Service Provider to complete Tyre Solution Provider and has become one of the pioneering unit in the country.
We are leading Tyre Repair Material Exporter like Tyre Repair Patches, Tube Patches, etc.
Our Mission
Provide our distributors and customers with excellent products that are premium and guaranteed. We tailor our products to meet high quality standards. We are committed in delivering our products and services efficiently and effectively at competitive price.
Our Vision
Our vision is to be the global leader in providing quality products and services of tire repair industry.
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Get In Touch
sales@blackstonerubber.com
+912912435428
Sales Office
277 – 280, Amrit Bhawan, 4th Road
Sardarpura, Jodhpur – 342003
Registered Office
Opposite Agarwal College, Agra Road
Jaipur - 302003
Factory
Nh-62, Pali Road, Near JIET College, Vilg Mogra