:root { --ros-navy: #0B2856; --ros-green: #89D84B; --ros-sky: #6B99C6; --ros-sand: #EDE7D4; --ros-linen: #FBF9F5; --ros-white: #FFFFFF; --ros-radius-sm: 4px; --ros-radius-md: 8px; --ros-radius-lg: 12px; --ros-radius-xl: 16px; --ros-space-sm: 8px; --ros-space-md: 16px; --ros-space-lg: 24px; --ros-space-xl: 40px; --ros-space-2xl: 64px; --ros-transition: 0.18s ease; } .sf-ros-tabs__mobile-select { display: none; width: 100%; padding: 12px 16px; margin-top: 20px; margin-bottom: 16px; font-family: inherit; font-size: 0.9375rem; font-weight: 700; color: var(--ros-navy); background-color: var(--ros-linen); border: 2px solid var(--ros-navy); border-radius: var(--ros-radius-md); appearance: none; -webkit-appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 20 20' fill='none'%3E%3Cpath d='M5 7.5l5 5 5-5' stroke='%230B2856' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 14px center; cursor: pointer; } @media (max-width: 767px) { .sf-ros-tabs__mobile-select { display: block; } .sf-ros-tabs__nav { display: none; } } .sf-ros-features-t2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 32px; margin: 56px 0; } .sf-ros-features-t2__card { background: var(--ros-linen); border-left: 5px solid var(--ros-green); border-radius: var(--ros-radius-lg); padding: 44px 44px 44px 48px; position: relative; } .sf-ros-features-t2 .sf-ros-features-t2__eyebrow { text-transform: uppercase !important; letter-spacing: 0.10em !important; font-size: 0.8125rem !important; font-weight: 700 !important; color: var(--ros-sky) !important; margin: 0 0 16px 0 !important; padding: 0 !important; } .sf-ros-features-t2 .sf-ros-features-t2__heading { font-size: 1.375rem !important; font-weight: 800 !important; text-transform: uppercase !important; letter-spacing: 0.01em !important; color: var(--ros-navy) !important; margin: 0 0 10px 0 !important; padding: 0 !important; line-height: 1.25 !important; } .sf-ros-features-t2 .sf-ros-features-t2__body { font-size: 1rem !important; line-height: 1.65 !important; color: #334155 !important; margin: 0 !important; padding: 0 !important; } .sf-ros-features-t2__body a { color: var(--ros-navy); text-decoration: underline; font-weight: 600; } @media (max-width: 767px) { .sf-ros-features-t2 { grid-template-columns: 1fr; gap: 24px; margin: 40px 0; } .sf-ros-features-t2__card { padding: 32px 28px 32px 32px; } .sf-ros-features-t2 .sf-ros-features-t2__heading { font-size: 1.1875rem !important; } } Description Specifications Compare Shipping & Returns Why ROS (function() { var sel = document.querySelector('.sf-ros-tabs__mobile-select'); if (!sel) return; sel.addEventListener('change', function() { var target = this.value; document.querySelectorAll('.sf-ros-tabs__panel').forEach(function(p) { p.classList.remove('is-active'); }); document.querySelectorAll('.sf-ros-tabs__btn').forEach(function(b) { b.classList.remove('is-active'); }); var panel = document.getElementById(target); var btn = document.querySelector('[data-tab="' + target + '"]'); if (panel) panel.classList.add('is-active'); if (btn) btn.classList.add('is-active'); }); })(); Description Specifications Compare Shipping & Returns Why ROS The Stack System Training Aid A SPEED TRAINING SYSTEM DESIGNED TO INCREASE CLUBHEAD SPEED THROUGH STRUCTURED WEIGHTED-CLUB TRAINING The Stack System is a speed training system designed to increase clubhead speed through structured weighted-club training. The Stack System pairs a weighted training club with an app-driven training program that tracks your speed progress over time. Hit prescribed numbers of shots at prescribed speeds, log into the app, and follow the system's prescriptive plan to add 5-10+ mph of clubhead speed. Who It's For SERIOUS GOLFERS FOCUSED ON ADDING DISTANCE THROUGH SPEED TRAINING. USED BY TOUR PROS AND COMPETITIVE AMATEURS. Serious golfers focused on adding distance through speed training. Used by tour pros and competitive amateurs. Pairs With Your Sim Setup FITS INTO ANY HOME PRACTICE ROUTINE Works alongside your existing sim setup, hitting mat, or putting green. Use it during warmup, between sets, or as a focused drill block. SimSquad can recommend training aid use cases if you're looking for specific swing improvements. What is the The Stack System? The Stack System is a speed training system designed to increase clubhead speed through structured weighted-club training. The Stack System pairs a weighted training club with an app-driven training program that tracks your speed progress over time. Hit prescribed numbers of shots at prescribed speeds, log into the app, and follow the system's prescriptive plan to add 5-10+ mph of clubhead speed. Why The The Stack System? Serious golfers focused on adding distance through speed training. Used by tour pros and competitive amateurs. Questions about whether this training aid fits your practice routine? SimSquad can recommend based on your goals. Frequently Asked Questions What does the The Stack System do? The Stack System pairs a weighted training club with an app-driven training program that tracks your speed progress over time. Hit prescribed numbers of shots at prescribed speeds, log into the app, and follow the system's prescriptive plan to add 5-10+ mph of clubhead speed. Who is this product for? Serious golfers focused on adding distance through speed training. Used by tour pros and competitive amateurs. Can I use it indoors and outdoors? Yes for most use cases. Specific use environment depends on the product — check the specs section for details. What's the warranty? Standard The Stack System manufacturer warranty. Rain or Shine Golf SimSquad handles any post-ship questions. Training Aid Specifications Type a speed training system designed to increase clubhead speed through structured w Manufacturer The Stack System Use Environment Indoor and outdoor for most use cases Sim-Specialist Support Yes, via Rain or Shine Golf SimSquad Free Shipping Free standard shipping on all orders within the continental US. No minimum order, no surprises at checkout. Hassle-Free Returns Not the right fit? We offer a 30-day return window on accessories in original, unopened condition. Contact us to start a return. Secure Packaging Every accessory ships in protective packaging with full materials. Arrives ready to use, right out of the box. Real Human Support Questions about your order, shipping timeline, or return? Our team is here. Reach out anytime. Why Buy From Rain or Shine Golf? Simulator Specialists We sell golf simulators exclusively. No TVs, no fitness equipment, no distractions. Every product we carry has been evaluated by our team. We know what works and what doesn't. Free Expert Consultation Our SimSquad team helps you find exactly what fits your space and budget before you buy. Talk to SimSquad → Trusted Since 2016 We've been building out home simulators since 2016. Thousands of setups. We've seen what works, what doesn't, and what's overpriced. We're here to help you make the right call. Price Match Guarantee Found it cheaper somewhere else? Let us know. We'll match any authorized retailer's price on the same product. No haggling required. Free Fast Shipping Free standard shipping on everything. No minimums. Most accessories ship within 1–2 business days from US-based warehouses. Real Golfer Tested Our team are golfers and simulator owners. We test the products we sell and give honest feedback on the site, on YouTube, and in every consultation call. Chat With Our SimSquad
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