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Live · checked today · 2 UK retailers tracked
Callaway B21 Driver vs Mizuno ST-G Driver
Quick verdict
Checked daily across 2 UK retailers
Price and availability verdict
Callaway B21 Driver is currently £169.95 used, while Mizuno ST-G Driver is currently £229. Deal scores are Mizuno ST-G Driver 26/100; against tracked history, Callaway B21 Driver is at its lowest tracked price and Mizuno ST-G Driver is 35% above its lowest tracked price. Callaway B21 Driver is currently available from 1 UK retailer, versus 2 for Mizuno ST-G Driver.
Deal intelligence
Should you buy now, or wait?
The Callaway B21 Driver is at its lowest tracked price today. The Mizuno ST-G Driver has more room: its tracked low is £169.95.
Callaway · B21 Driver
Not enough data yet
Today £169.95 · typical £199.95 · lowest £169.95
Mizuno · ST-G Driver
High vs its history
Today £229 · typical £219 · lowest £169.95
On sale 2 times in the last 5 months
Head to head
Category leaders, from the data on this page
- Cheapest new B21 £169.95 vs £229
- Closest to its tracked low B21 0% above vs 35%
- Most retailers in stock ST-G 2 vs 1
Where to buy
2 UK retailers, checked daily
Price trajectory
How each has moved since we started tracking
Lowest tracked price per day, any condition. Caddence tracks both daily. Shaded spans are days we couldn’t collect prices — the lines break rather than guessing.
Callaway · B21 Driver
↓ £30
since 9 April 2026
Lowest £169.95 on 18 August 2026
Mizuno · ST-G Driver
↓ £100
since 13 February 2026
Lowest £169.95 on 15 April 2026
New vs used
From used listings we track
Callaway · B21 Driver
NEW £169.95
USED FROM £169.95
Availability by build
Which configurations are in stock right now
| Build | Callaway B21 Driver | Mizuno ST-G Driver |
|---|---|---|
| Regular · 9° · Left-hand · Used | 1 retailer · from £169.95 at Replay Golf → | — |
| Senior · 9.5° | — | 1 retailer · from £229 at Affordable Golf → |
| Stiff · 9.5° · Left-hand | — | 1 retailer · from £229 at Affordable Golf → |
| Stiff · 9.5° | — | 1 retailer · from £237.95 at Replay Golf → |
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Common questions about the Callaway B21 Driver vs Mizuno ST-G Driver
Prices shown are the cheapest in-stock price per retailer tracked by Caddence, updated daily. Always confirm the final price on the retailer's site.