Bike speed calculator: tyre, cadence and gear ratio
Posted by Jollymap - 5 Aug 2024 - Bike Speed Calculator
Estimate speed from tyre size, cadence and gear ratio, with an ISO tyre chart so you can compare it with your own bike.
Jollymap小貼士
How far is the difference between large and small bike wheels? | Testing 8 different bikes from Dahon K3, Brompton, Birdy to road bikes | There's a surprise at the end!
Posted by Jollymap - 5 Dec 2023 - 產品介紹
Many people often wonder how much difference there is when riding bikes with large and small wheels. Compact folding bikes save space but require more effort to pedal and are not as easily capable of achieving high speeds. On the other hand, road bikes with larger wheels are often associated with greater momentum and the ability to cover longer distances. But how much of a difference is there in reality? Jollymap will conduct a simple test to provide an answer. We will perform a test where the bike is pushed down a slope without pedaling, allowing it to roll naturally, and observe the differences in rolling distances among bikes with different wheel sizes. Although this test is not highly scientific, as wheel sizes are not the only factor, each bike has its own design, specifications, and maintenance. Additionally, the road surface may not be perfectly even, with some slight variations in elevation. Nevertheless, this test will provide an overall understanding of the differences in inertia between different wheel sizes. And most importantly... it's all for fun, staying true to the spirit of "taking trivial matters seriously" in this case.
【必定收藏】單車出車前10大基本檢查及留意位你要知！睇到最尾仲有bonus貼士！
Posted by Jollymap - 3 Jun 2023 - Jollymap小貼士
很多客人買了車後都會問我們，究竟我出車之前有什麼要檢查。這次我會拍攝這段影片，一次過講十個你出車之前要檢查和要留意的地方，並會教大家如何拆這一個前輪，方便收藏和上落車，避免在騎行途中出現故障。
為什麼踩平衡車會令小朋友較快學會踏單車？
Posted by Jollymap - 9 May 2023 - 2025 Balance Bike recommendation
父母們經常為如何開始教小朋友踏單車而比較平衡車和有輔助輪的單車。你可能會留意到從有輔助輪的單車過渡至2輪單車可能會嚇怕部分兒童，尤其是如果他們還沒有充分發展他們的平衡感。因為如果學平衡車，小朋友是先學會平衡，才學會如何用踏板。
如何選擇合適的單車頭盔？
Posted by Jollymap - 27 Feb 2023 - 2025 Helmets and Protective gear recommendation
不少父母都為小朋友找一個適合的單車頭盔而苦腦。又不知道如何為小朋友量度頭圍，又不清楚正確的配戴頭盔方法。這裡有所有的答案和推介頭盔，任君參考。
50個新年祝福語句。有幾多係同兔年有關?
Posted by Jollymap - 18 Jan 2023 - 其他資訊
50個新年祝福語句。有幾多係同兔年有關? 中國新年是中國最重要的節日之一，它是中國傳統文化的重要組成部分。新年是一個慶祝新開始、祈求好運和幸福的時間。中國新年最重要的活動之一是舉行家庭聚會。在這個時候，家人們回到家鄉，在一起吃飯、聊天、觀看新年節目，並互相祝福。這也是為了紀念過去一年的成就，並為新的一年祈求好運。
