How to Identify and Measure Your Guitar Bridge Before Buying a Replacement?Updated a month ago

How to Identify and Measure Your Guitar Bridge Before Buying a Replacement?

Why Bridge Identification Matters?

Many guitar bridges look similar but use different mounting systems and dimensions.

Ordering a replacement based only on appearance can result in:

• Incorrect mounting hole spacing
• Incompatible studs or screws
• Poor string alignment
• Installation difficulties

Before purchasing a replacement bridge, identify your bridge type and verify its critical measurements.

Step 1: Identify Your Bridge Type

Tune-o-Matic (TOM)

Common on:

• Les Paul
• SG
• ES-335

Characteristics:

• Separate bridge and tailpiece
• Six adjustable saddles
• Mounted on two posts

Key measurements:

• Post spacing
• Post thread type
• Saddle/string spacing

Wraparound Bridge

Common on:

• Les Paul Junior
• Les Paul Special
• SG Junior

Characteristics:

• Bridge and tailpiece combined
• Strings wrap around the bridge

Types include:

Lightning Bolt Wraparound

Modern Compensated Wraparound

Adjustable Wraparound

Key measurements:

• Stud spacing
• Thread type
• String spacing

Stratocaster Tremolo Bridge

Common on:

• Stratocaster-style guitars

Characteristics:

• Tremolo arm
• Six saddles
• Spring cavity in rear

Key measurements:

• Mounting screw spacing
• String spacing
• Block dimensions

Telecaster Bridge

Common on:

• Telecaster-style guitars

Characteristics:

• Bridge plate mounted with screws
• Strings may pass through body

Key measurements:

• Mounting pattern
• Pickup cutout compatibility
• String spacing

Hardtail Bridge

Common on:

• Modern fixed-bridge guitars

Characteristics:

• No tremolo
• Fixed mounting screws

Key measurements:

• Mounting pattern
• String spacing

Floyd Rose Style Bridge

Common on:

• Metal and shred guitars

Characteristics:

• Locking nut
• Floating tremolo
• Fine tuners

Key measurements:

• Post spacing
• Stud diameter
• Tremolo cavity dimensions

Step 2: Determine Which Measurements Matter

Different bridge types require different measurements, but these are the most common.

Measurement

Why It Matters

Post spacing

Determines whether the bridge can mount

Screw spacing

Determines whether holes align

Thread size

Determines stud compatibility

String spacing

Affects string alignment

Baseplate dimensions

Determines fitment

Saddle travel

Affects intonation range

Step 3: How to Measure Bridge Correctly (Center-to-Center Measurement)

Most bridge dimensions are measured from the center of one mounting point to the center of another.

Correct: Measuring Center-To-Center

1O-------------O
2^ ^
3Center Center
4

Not: Measuring outside edge to outside edge

1| O---------O |
2

Not: Measuring inside edge to inside edge

1O |-------| O
2

Measuring Stud Spacing

Used for:

• Tune-o-Matic
• Wraparound
• Floyd Rose

Measure:

Center of left stud → Center of right stud

Measuring Screw Spacing

Used for:

• Telecaster bridges
• Strat bridges
• Hardtail bridges

Measure:

Center of first screw → Center of last screw

Measuring String Spacing

Measure:

Center of low E string → Center of high E string

Typical guitar values:

• 50 mm
• 52 mm
• 54 mm
• 56 mm

Step 4: Common Bridge StandardsMetric Hardware

Common on:

• Most imported guitars
• Most DIY guitar kits

Typical threads:

• M4
• M6
• M8

Imperial Hardware

Common on:

• Gibson USA
• Fender USA
• Historic reissues

Typical threads:

• SAE sizes
• 6-32
• 8-32
• 10-32

Step 5: Buying a Replacement Bridge

When reviewing a product listing, verify:

✓ Bridge type matches

✓ Number of strings matches

✓ Post or screw spacing matches

✓ Thread size matches

✓ String spacing is compatible

✓ Mounting style matches

Common Mistakes

Buying Based Only on Appearance

Many bridges look identical but use different mounting dimensions.

Ignoring Thread Type

Correct spacing does not guarantee correct stud compatibility.

Mixing Metric and Imperial Hardware

A common source of fitment issues.

Assuming All "Les Paul" Bridges Fit All Les Pauls

Bridge specifications vary between manufacturers and production years.

If You Are Unsure

Before ordering:

1. Identify the bridge type.
2. Measure the critical dimensions.
3. Compare them with the manufacturer's specifications.
4. Contact the seller if dimensions are unavailable.

Providing photos of your guitar and bridge can also help verify compatibility before purchase.