Outer Envelopes

Robbins outer envelopes are designed to fit a wide variety of tire sizes, delivering precise sealing and consistent curing performance. Our intuitive search tools allow you to select the appropriate sealing method, tire size, or casing size, ensuring you identify the exact product number needed for your operation.

Whether you choose by sealing method and tire size or by casing size, Robbins’ outer envelope search system streamlines the ordering process—reducing downtime and minimizing errors in selecting the right envelope.

Need help choosing the right product?

Reach out to our team for expert guidance and personalized support.

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Inner/Outer Envelope Fitment Guide

Type your tire size into the search bar below to get the correct correspoding envelope size.

Tire SizeEnvelope Size
195/75R142710
205/75R142913
7.50R153211
8.25R153511
10.00R15 LT3211
215/85R163211
225/75R162910
235/85R163211
245/75R163211
12N16.5 (Tweel)3521
7.50R173211
9R17.53513
10R17.53511
11R17.53812
215/75R17.53213
245/70R17.53211
8R19.53515
225/70R19.53213
245/70R19.53513
265/70R19.53513
285/70R19.53511
305/70R19.53812
8.25R203812
9.00R204012
10.00R204213
11.00R204415
12.00R204413
13/80R204213
14.00R204415
14/80R204413
10.00R224213
11.00R2258x13
12.00R224413
9R22.53814
10R22.54014
11R22.54217
11R22.5 (Deep Lug)4215
12R22.54416
12.75R22.54416
15R22.54413
16.5R22.54513
18R22.54513
235/80R22.53816
245/75R22.53818
255/70R22.53816
265/75R22.53814
275/70R22.53814
275/80R22.54214
295/75R22.54214
295/80R22.54215
305/70R22.54217
305/75R22.54217
305/85R22.54416
315/80R22.54416
365/80R22.558x12
385/65R22.54415
385/65R22.5 (Deep Lug)4415
425/65R22.54515
445/50R22.54415
445/65R22.54814
455/55R22.54814
11.00R244415
12.00R244515
11R24.54418
11R24.5 (deep lug)4416
12R24.54416
275/80R24.54217
285/75R24.54217
305/75R24.54418
305/75R24.5 (deep lug)4418

Envelope Fitment Guide

Type your tire size into the search bar below to get the correct correspoding envelope size.

Tire SizeCasing SizePart #Inside Size
305/75R24.5Deep Lug 24.5442240x8-24.5
305/75R24.524.5422340x8-24.5
285/75R24.524.5422438x8-24.5
275/80R24.524.5422438x8-24.5
12R24.524.5442242x8-24.5
11R24.524.5442242x8-24.5
12.00R2424442344x10-24.5
11.00R2424442242x10-24.5
455/55R22.522.5442242x10-22.5
445/65R22.518R22.5 22.5452244x12-22.5
445/50R22.522.5421940x8-22.5
425/65R22.516R22.5 22.5452244x10-22.5
385/65R22.515R22.5 22.5442242x10-22.5
315/80R22.522.5442240x8-22.5
305/85R22.522.5422440x8-22.5
305/75R22.522.5402338x8-22.5
305/70R22.522.5402338x8-22.5
295/80R22.522.5422438x8-22.5
295/75R22.522.5402338x8-22.5
275/80R22.522.5402338x8-22.5
275/70R22.522.5382235x8-22.5
265/75R22.522.5382235x8-22.5
255/80R22.522.5382235x8-22.5
255/70R22.522.5382235x8-22.5
245/75R22.522.5382235x8-22.5
235/80R22.522.5382235x8-22.5
12.75R22.522.5422440x8-22.5
18R22.522.5452244x12-22.5
16R22.522.5452244x10-22.5
Tire SizeCasing SizePart #Inside Size
15R22.522.5442242x10-22.5
12.75R22.522.5422440x8-22.5
12R22.522.5422440x8-22.5
11R22.522.5422438x8-22.5
10R22.522.5402338x8-22.5
9R22.522.5382235x8-22.5
11.00R2222442242x8-22.5
10.00R2222442240x8-22.5
365/80R2020442242x10-20
14/80R2020442342x8-20
14.00R2020452244x12-20
13/80R2020422440x8-20
12.00R2020442242x10-20
11.00R2020422440x8-20
10.00R2020422440x8-20
9.00R2020402338x8-20
8.25R2020382235x8x20
305/70R19.519.5352135x8-19.5
285/70R19.519.5382235x8-19.5
265/70R19.519.5352132x8-19.5
245/70R19.519.5321829x7-19.5
225/70R19.519.5321829x7-19.5
8R19.519.5321829x7-19.5
245/70R17.517.5311729x7-16
215/75R17.517.5311727x5-16
11R17.517.5382235x8-17.5
10R17.517.5352132x8-17.5
9.5R17.517.5321832x8-17.5
9R17.517.5321832x8-17.5
7.50R1717321829x7-17.5
245/75R1616321829x7-16
235/85R1616311729x7-16
225/75R1616291627x5-16
215/85R1616311729x7-16
7.50R1616321829x7-16
1000R1515352110.00x15 HB
8.25R151532188.25-15 HB
7.50R151531177.50x15 HB