640/700R13 Tire Size Guide

The 640/700R13 uses an older numeric specialty format. The 640 and 700 identify two nominal width references associated with the size, the R indicates radial construction, and the 13 means the tire fits a 13-inch wheel.

Modern P-metric sizes usually spell out width in millimeters, sidewall profile, construction, and wheel diameter in one code. The 640/700R13 does not work that way, so it reads more like a vintage sizing convention than a current mass-market passenger size. Buyers usually treat it as a classic radial replacement size and then confirm actual rim width, load capacity, and physical clearance before using it as a substitute for another format.

The 640/700R13 fits a 13.0-inch wheel, which is 330.2 millimeters at the bead seat. The wheel diameter must match exactly for proper mounting.

Wheel width matters along with wheel diameter. In this size, the supported rim width range is 4.00 to 5.50 inches, which affects how the tire sidewall stands and how the tread sits on the road. A wheel outside that range can change the shape of the tire enough to create fitment, wear, or clearance issues, so both diameter and width should be checked before installation.

The 640/700R13 has a section width of 6.4 inches, which is about 162.6 millimeters. Section width measures the tire at its widest point from sidewall to sidewall.

Tread width is usually narrower than section width, so section width is the more important number for fitment planning. Fender lips, suspension links, inner wheelhouses, and brake components all live closer to the sidewall than the tread face. On a classic car with tight original wheel openings, even a small width difference can affect rubbing, steering clearance, or the way the tire fills the wheelwell.

Yes, 640/700R13 and 640700R13 refer to the same basic tire size. The difference is only how the size is written, not a change in wheel diameter or construction category.

Older and specialty tire sizes often appear in several written forms, especially when catalogs, sidewalls, and search systems handle punctuation differently. Buyers should still look past the shorthand and confirm the important details on the actual tire: 13-inch rim diameter, radial construction, rim width range, and load capacity. Matching the notation alone is not enough if the wheel or vehicle setup differs from the intended application.

A 640/700R13 in this size weighs 20 pounds per tire. That figure refers to the tire alone, without the wheel.

Tire weight matters because it contributes to unsprung weight, which can influence ride response and steering feel on lighter classic cars. It is not usually the first number buyers look at, but it becomes more relevant when comparing reproduction tires, assembling a matched set, or trying to keep a vehicle close to its original character. Weight should be considered alongside construction, wheel width, and load capacity rather than in isolation.

The 640/700R13 is commonly used in classic passenger car applications where owners want vintage proportions on a 13-inch wheel. It can be a useful replacement candidate for older 13-inch fitments, but matching wheel diameter alone does not confirm interchangeability.

Clearance, ride height, steering range, and vehicle load needs still have to be checked on the actual car. Multi-width vintage sizing can overlap with several older fitments, which is why original documentation and a hands-on wheel measurement matter so much. Treat the size as a starting point for research, then confirm that the wheel width falls within 4.00 to 5.50 inches and that the tire's shape works with the suspension and fender opening.

The 640/700R13 fits rims from 4.00 to 5.50 inches wide. Staying within that range helps the tire keep the profile it was designed to have.

A narrow wheel tends to pull the sidewalls inward and can make the tire look taller and more rounded. A wider wheel spreads the casing flatter, which can change appearance, steering response, and clearance at the outer fender edge. On a classic car, those changes can affect both stance and originality, so wheel width should be verified before assuming any 13-inch rim is automatically suitable.

The 640/700R13 can make sense for a classic car owner who wants vintage sizing and appearance with radial construction. It is especially relevant when the goal is to preserve an older look while improving day-to-day drivability compared with a traditional bias-ply setup.

Judged originality can be a different question. Some restorations call for the construction type originally used on the vehicle, and a radial may not match that standard even if the visual proportions are close. When appearance, road manners, and authenticity all matter, compare the tire's construction, sidewall style, and wheel fit against the car's original documentation before deciding.

The 640/700R13 uses radial construction, so drivers often choose it for more settled road manners than an older bias-ply tire of similar vintage proportions. A radial typically changes the way the tire flexes, which can influence straight-line tracking, steering response, and ride behavior.

Results still depend on the vehicle itself. Suspension condition, alignment settings, steering play, wheel width, and inflation all shape how a classic car feels on the road. A radial does not erase worn components or guarantee modern-car behavior, but it can be a practical choice for owners who want classic proportions without giving up the road feel associated with radial construction.

The 640/700R13 is often chosen because it combines classic sizing with radial construction, a mix that can suit regular road use better than many older-format tires. Its vintage-style proportions help preserve the look of a period car while aiming for more familiar street manners.

Ride comfort is shaped by more than the tire size alone. Wheel width, vehicle weight, shock condition, seat-of-the-pants expectations, and how the car is aligned all play a role. Buyers using a classic car for local drives, club events, or occasional highway travel should think about the entire setup rather than expecting the tire alone to define comfort.

The 640/700R13 carries vintage proportions, so its visual effect is often part of the appeal. On a classic passenger car, a size like this can influence how full the wheel opening looks and how balanced the car appears from the side.

Road feel changes with both construction and wheel fit. Mounted on a rim within the 4.00 to 5.50 inch range, the tire will keep a profile closer to its intended shape. Outside influences such as spring height, bushing wear, steering geometry, and the actual wheel offset can change the outcome, so stance and drivability should be judged as a system rather than by size code alone.

The 640/700R13 is available from Vredestein. In a specialty size like this, brand choice matters because buyers are usually balancing vintage appearance, radial construction, and dependable fit on an older wheel setup.

Selection should go beyond the name on the sidewall. Check whether the tire's construction matches the way the vehicle will be used, whether the sidewall appearance suits the build, and whether the load capacity and rim width range fit the car. For classic vehicles, consistency across all four tires also matters, since mixed constructions or mismatched profiles can change both appearance and road behavior.

A quality 640/700R13 should match the vehicle's intended use first. In practical terms, that means confirming radial construction, checking that the tire fits a 13-inch wheel and a 4.00 to 5.50 inch rim width, and making sure the load rating suits the car.

Classic-car buyers also pay attention to proportion and appearance. A tire in this size often needs to look right in the wheel opening as much as it needs to perform properly on the road. Build quality, sizing consistency, even wear potential, and a matched set from the same product line all matter more than chasing a generic idea of the 'best' tire.

Yes, sidewall style matters because it changes the visual character of the car even when the size itself stays the same. The 640/700R13 is offered here in a blackwall design, which gives a cleaner, more understated appearance than a whitewall or specialty stripe tire would.

Appearance choices should match the vehicle's era, trim level, and restoration goals. Some owners want a factory-like look, while others prefer a subtler sidewall for a driver-quality build. Sidewall style does not change the wheel diameter or the basic fitment requirements, but it can strongly influence whether the finished car looks authentically finished or visually out of place.

The 640/700R13 should be inspected regularly for cracking, bulges, cuts, uneven wear, and gradual air loss. Those checks matter on classic cars because they may see irregular mileage, long idle periods, or suspension conditions that are very different from a newer daily driver.

Inspection should include the sidewalls, tread surface, valve area, and the way the tire is wearing across the tread. Uneven wear can point to alignment or wheel-width issues as much as tire condition. Before any longer drive, look for changes in shape or pressure retention and correct underlying mechanical problems instead of assuming the size itself is at fault.

A lightly used 640/700R13 can still age even if the tread looks good. Time, heat, sunlight, ozone exposure, and long periods of sitting all affect the rubber and carcass, sometimes long before the tire appears worn out.

Storage conditions matter almost as much as mileage on collector vehicles. Keep the car away from direct sunlight, electric motors, and damp conditions, and move it occasionally to reduce prolonged flat spotting. If the tire shows weather checking, sidewall cracking, vibration that does not clear up, or other age-related changes, replacement deserves serious consideration regardless of remaining tread depth.

The best habits are simple ones: check inflation regularly, keep the front end aligned, and inspect the tires often for uneven shoulder or center wear. The 640/700R13 is still a specialty classic size, so routine attention helps catch small problems before they become expensive or unsafe ones.

Wheel width and vehicle condition both affect wear. A tire mounted outside its intended rim range or run on a car with worn bushings, weak shocks, or loose steering parts can develop irregular wear patterns quickly. Regular use, occasional rotation when the vehicle setup allows it, and prompt correction of suspension issues usually do more for longevity than any single maintenance shortcut.

The 640/700R13 should be replaced when age, cracking, bulges, persistent air loss, impact damage, or irregular wear begin to compromise its condition. Tread depth alone is not the whole story, especially on collector vehicles that spend part of the year parked.

Buyers should inspect the entire tire, not just the center tread blocks. Sidewall weather checking, belt-related distortion, vibration, or repeated pressure loss are all signs that service life may be ending. Before road trips or higher-speed use, it is wise to look closely at condition, verify the wheel is correct for the tire, and have a professional inspect anything that seems questionable.

Load rating is critical because each 640/700R13 tire in this size is rated to carry 1,202 pounds at 51 psi. That figure should be matched against the actual vehicle's requirements rather than assumed from appearance or wheel diameter alone.

Classic cars vary widely in curb weight, passenger load, and how they are used. A lightly driven show car and a fully occupied road car can place very different demands on the same tire size. When selecting or replacing tires, compare the per-tire load requirement with the tire's rating and keep the wheel size and rim width within the intended range for the complete setup.

The 640/700R13 can be a sensible choice for classic road use when the tire is in good condition and matched to the vehicle's needs, but modern-road confidence depends on more than the size code. Construction, tire age, wheel fit, suspension condition, and inflation all affect the outcome.

Road use should begin with a practical check of the whole system. Confirm the 13-inch wheel diameter, make sure the rim width falls within 4.00 to 5.50 inches, inspect for age-related deterioration, and verify that the 1,202-pound-at-51-psi load rating suits the car. Local requirements and current sidewall markings should also be reviewed before extended highway or interstate driving.