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Ships within 48 hours · Estimated delivery Jul 19 - Jul 24
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
gravel bike framesets Altera G21 DB Gravel Bike Frameset Prism BlueSpecifications of Altera G21 UCI Approved Yes Parts Included G21 Frame, Fork, Handlebar, Seatpost Lead Time 45days Frame Size 45cm,49cm, 52cm, 54cm, 56cm, 58cm, 60cm Material High Modulus Toray 800 Carbon Fiber Color Prism Blue BB BB T 47 inboard bearing GRX crank: T47 BB inboard bearing for Shimano 24mm spindle size SRAM DUB DUB wide crank: T47 BB inboard bearing for SRAM DUB SRAM GXP: T47 BB inboard bearing for SRAM GXP BB Width 85. 5mm Headtube
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Specifications of Altera G21
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UCI Approved
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Yes
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Parts Included
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G21 Frame, Fork, Handlebar, Seatpost
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Lead Time
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45days
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Frame
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Size
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45cm,49cm, 52cm, 54cm, 56cm, 58cm, 60cm
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Material
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High Modulus Toray 800 Carbon Fiber
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Color
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Prism Blue
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BB
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BB T-47 inboard bearing
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- GRX crank: T47 BB inboard bearing for Shimano 24mm spindle size
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- SRAM DUB / DUB wide crank: T47 BB inboard bearing for SRAM DUB
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- SRAM GXP: T47 BB inboard bearing for SRAM GXP
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BB Width
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85.5mm
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Headtube
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Straight 1-1/2”
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Rear Dropout
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12*142 Thru Axle
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Rear Derailleur Hanger
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Universal Derailleur Hanger (UDH) - Replaceable
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Frame Weight
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Champagne 1170g (56cm)
Raw 1150g (56cm)
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Handlebar
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H21 carbon integrated handlebar
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Handlebar Size
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400mm, 420mm, 440mm
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Stem Size
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80mm, 90mm, 100mm, 110mm
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Handlebar Weight
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360+/-15g (420x90)
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Fork & Seatpost
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Fork
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1 1/8" - 1 1/2", 12*100 Thru Axle
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Fork Weight (Painted, 56cm frame)
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480g
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Seatpost Weight
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95.2g (without clamp)
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Seatpost Shape
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Round (27.2mm)
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Compatibility
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Chainring
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- Single: Max of 42t for normal crank spindle and 44t for wide crank spindle
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Brake Fitment
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Flat Mount Disc
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Cable Routing
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Internal
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Bottle Mounts
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4
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Mudguard Compatible
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Yes
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Cargo Rack Compatible
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Yes
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Max Tire Width
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700x53mm, 650Bx2.1” (single chainring setup)
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Accessories
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Handlebar Spacers
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- 3mm: 1PC
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- 5mm: 1PC
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- 10mm: 2PCS
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Headset Bearing Cap
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10mm: 1PC
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Front Axle
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1pc
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Rear Axle
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1pc
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Limited Rider Weight
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125KG
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Warranty
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6 Years
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Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.2 ★★★★★
Based on 24 reviews
Sort
Product Reviews
★★★★★ 5
Excellent Summer Workbooks - Keeps Kids Engaged and Ready
Format: Paperback
These workbooks have been an absolute lifesaver for keeping my kids on track over the summer! I was looking for a resource that would help them retain what they learned and prepare for the next school year without feeling like a chore, and these deliver perfectly.
What I particularly love is how well **organized they are by days**. This structure eliminates any guesswork and makes it incredibly easy to assign manageable chunks of work each day, which helps to **keep my kids consistently on track**. There's no overwhelm, just steady progress.
The content is engaging, and it genuinely seems to reinforce key concepts in a fun way. We've had **absolutely no complaints** from the kids, which is a huge win for any summer learning material! I highly recommend these workbooks for any parent looking for a structured and effective way to bridge the academic gap during the summer break.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 28, 2025
★★★★★ 5
⭐️⭐️⭐️⭐️⭐️ An Engaging Way to Prevent Summer Slide!
Format: Paperback
This Summer Bridge Activities Workbook is an essential tool for keeping kids engaged in learning over the summer! Covering reading, writing, math, science, and social studies, it ensures a well-rounded review of key subjects in just 15 minutes a day. The fun, interactive activities keep kids motivated, and the inclusion of flashcards, stickers, and online IXL practice adds extra value. I’ve recommended this to parents every year because it helps students transition smoothly into the next grade while maintaining their academic progress. If you want to prevent learning loss in a fun, low-stress way, this workbook is a fantastic choice!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 15, 2025
★★★★★ 5
So much to learn
Great workbook for kids
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 7, 2026
★★★★★ 4
Great summer workbook
Format: Paperback
This book is a great tool to use over summer break to prevent loss of learning. I have been using this book with my 2nd grader for a few weeks and he enjoys the short lessons. I would prefer the lessons have a few more questions to cover each lesson.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 26, 2025
★★★★★ 5
Great way to support summer learning!
Format: Paperback
I absolutely love the Summer Bridge Activities: Bridging Grades 3–4! This workbook is a fantastic way to keep kids engaged and learning over the summer break. The activities are well-designed, fun, and educational, providing the perfect balance between reinforcing what they’ve already learned and getting them excited for the next school year. The layout is visually appealing, with colorful pages and interactive exercises that make learning feel like play.
What I appreciate most is how it covers key subjects like math, reading, writing, and critical thinking skills in bite-sized chunks that kids can easily manage. My child enjoyed doing a little bit each day, and I noticed significant improvement in their confidence as they completed each activity. It's great that this workbook also includes helpful tips for parents to guide their kids through the exercises.
Overall, this is a must-have resource for parents looking to keep their children sharp and engaged during the summer while still having fun. Highly recommend!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 21, 2025
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