Professional 10 & 13mm Spanner
£6.99
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Professional 10 & 13mm Spanner
£6.99
Taxes included.
10-13mm open-end spanners (metric) are forged in premium chrome vanadium steel with a high chrome finish. The open end is angled at 15° from the handle axis.
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#219 Chain Gear Ratio & Drive Link Calculator
⚡ Setup Controls
11 T
76 T
8.0 in
10.8 in
16,000
Gear Ratio
6.91
Top Speed
74.2 MPH
Req. Chain Links
108 Links
Exact Center
8.02 in
📐 Dynamic Drive Envelope & Chain Wrap
📊 Rear Sprocket Comparison Table (±3 Teeth)
| Sprocket | Ratio | Est. Top Speed | Speed Diff | Rec. Links | Tuning Dynamic |
|---|