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Graph Tech Guitar Labs Ltd.

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Graph Tech Guitar Labs Ltd.

4.5 (123)

Ratio by Graph Tech Model # 2721-C0 (12:1 to 39:1) Electric 6 in-Line

Name: Graph Tech Guitar Labs Ltd. Ratio by Graph Tech Model # 2721-C0 (12:1 to 39:1) Electric 6 in-Line - Ratio by Graph Tech Model # 2721-C0 (12:1 to 39:1) Electric 6 in-Line
Brand: Graph Tech Guitar Labs Ltd.
SKU: 29499589591063
Price: 114.99 USD
Availability: InStock
Rating: 4.8889 (8 reviews)

4.5 (1,234)

Sold 100+ last 30 days

20% off first order

$114.99

Quantity

Color

Black

Quantity

Description

RATIO® patented gear technology
RATIO® - Calibrated Machine Heads incorporate different string gauges into the tuning equation.
From Low E to High E 39:1, 24:1, 20:1, 35:1, 20:1, 12:1.
We balanced the gear ratios to each string simplifying t...

Reviews

4.9

9 ratings

Seriously Smooth

Best tuners I have tried and I plan to use them on my next guitar. Worth every penny and then some!

David · February 17, 2026

ratio tuners

love em

Macyl · October 14, 2024

Fender Telecaster JA-90 - slotted right in!

I bought these to replace the stock machine heads on my Fender Telecaster JA-90 (the stock ones are okish) and please to report these ones slotted right in with no modifications. They are obviously high quality and the different ratios work well for natural feel when tuning. Love them so far (2 weeks in, home practise only)

Kevin · January 13, 2024