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Chevrolet Blazer (S-10)
1995–2005 4-door

Factory gearing, tires, angles and brakes for the Blazer (S-10), and what the usual upgrades do to it. Every number is from the maker's own figures unless the calculators say otherwise. A few figures here are still waiting on a factory document; the calculators mark them.

Use this truck in the calculators
107 in wheelbase · 34.5 in front · 39.7 in rear overhang
in
Stock tireP205/75R1527.1 in tall
Axle ratio3.42–3.73Factory, by trim
Crawl ratio31.0:1Best trim: Base/LS 4x4, P205/75R15
Angles26 · 20 · 22°Approach, breakover, departure
Clearance8.3 in8 to 8.3 in by trim
Highway mpg18EPA

Tire upgrades, worked out

Base/LS 4x4, P205/75R15, 3.42s, from P205/75R15
TireHeightUnder the diffsSpeedo at 65RPM at 65Gears for dailyOpen
235/75R1528.9 in+0.9 in61 mph1,8113.73Open →
31x10.50R1531.0 in+1.9 in57 mph1,6874.1Open →
32x11.50R1532.0 in+2.4 in55 mph1,6354.1Open →
33x10.50R1533.0 in+2.9 in53 mph1,5854.1Open →
33x12.50R1533.0 in+2.9 in53 mph1,5854.1Open →

Stock turns 1,930 rpm at 65 in top gear. Flotation sizes are nominal; most measure a little short mounted.

Trims

2 we have figures for
TrimTireTransmissionAxleAnglesClearanceOpen
Base/LS 4x4, P205/75R15P205/75R154-speed automatic3.42 / 3.7326 · 20 · 228.3 inUse →
Touring/Premium ride, P235/70R15P235/70R154-speed automatic3.42 / 3.7327 · 21 · 238.0 inUse →

Size

Wheelbase
107 in
Front overhang
34.5 in
Rear overhang
39.7 in
Height
72 in
Body
SUV
Stock tires
P205/75R15, P235/70R15

Transmissions and low range

4-speed automatic (4L60-E)
3.06 · 1.63 · 1 · 0.7
Low range, np231
2.72:1
Low range, nv233
2.72:1
Low range, nv136
2.72:1

Axles

Front
GM 7.25 in IFS
Rear
GM 7.625 in 10-bolt (ZR2: GM 8.5 in)
3.42 ratio
Base/LS 4x4, P205/75R15, Touring/Premium ride, P235/70R15
3.73 ratio
Base/LS 4x4, P205/75R15, Touring/Premium ride, P235/70R15
Ratios made for it
3.73 · 4.1 · 4.56

Brakes

Front rotor
10.79 in, 274 mm
Front caliper piston
46.0 mm
Rear rotor
11.61 in, 295 mm
Rear
disc (vented, 295 x 20 mm)

Suspension

Front
4x4: double wishbone IFS, torsion bars
Rear
leaf springs, solid axle
Rear layout
Leaf springs

Fuel economy

EPA highway, automatic
18 mpg
EPA highway, manual
18 mpg
Rated years
1995–2005, 4WD

Frame

Outside of the rails
40.35 in
Rail top at the rear axle
24.4 in off the ground
Measured on
P205/75R15

Aftermarket bumpers

2 listed

Makers almost never publish angles, bottom heights or how far a bumper tucks, so these fill in as owners measure them. Measured yours? Add it on the rig page and every owner of this Blazer (S-10) sees how it does on their tires and lift.

Front 2

Rear

None listed yet.

Every calculator, set up for the Blazer (S-10)

Tire sizeBigger tires: speedo, clearance, angles and brakes.Compare tiresRegearHighway RPM on every ratio and mpg.Pick your gearsCrawl ratioHow slow it creeps, against other trucks.Work out crawlSpeedometerWhat it really reads on new tires.Fix your speedoLinksAnti-squat and what a lift does to it.Check your linksYour rigBuild sheet and measured angles.Start a build sheetLeaderboardsWhere the Blazer (S-10) ranks against every stock truck.See where it ranks

Source: auto-brochures.com. The 7.25 in IFS front has very limited ratio choices; ZR2 rear 8.5 and std 7.625 use different gear sets.

Use at your own risk. These calculators are here to help you plan and to inform your decisions, not to sign off on a build. Many numbers are estimates worked out from factory figures, and some factory figures are not yet confirmed. Check every number against your own truck, its manuals and a qualified shop before you buy parts, cut, weld, lift, regear or drive on it. Long Range Desert Tools is not liable for anything you do based on these calculators or their results. The full terms are in our policies.