diff --git a/thaw/src/field/docs/mod.md b/thaw/src/field/docs/mod.md
index 8feb84b..705fc26 100644
--- a/thaw/src/field/docs/mod.md
+++ b/thaw/src/field/docs/mod.md
@@ -21,7 +21,7 @@ view! {
 }
 ```
 
-### validate
+### Validation rules
 
 ```rust demo
 view! {
@@ -38,6 +38,12 @@ view! {
                     <Checkbox label="Remember me" value="true"/>
                 </CheckboxGroup>
             </Field>
+            <Field name="radio">
+                <RadioGroup rules=vec![RadioGroupRule::required(true.into())] >
+                    <Radio label="0" value="false"/>
+                    <Radio label="1" value="true"/>
+                </RadioGroup>
+            </Field>
             <button
                 type="submit"
                 on:click={
diff --git a/thaw/src/field/rule.rs b/thaw/src/field/rule.rs
index c09e367..27ad2f3 100644
--- a/thaw/src/field/rule.rs
+++ b/thaw/src/field/rule.rs
@@ -2,6 +2,7 @@ use super::{FieldContextInjection, FieldInjection, FieldValidationState};
 use leptos::prelude::*;
 use send_wrapper::SendWrapper;
 use std::ops::Deref;
+use thaw_utils::{Model, OptionModel};
 
 type RuleValidator<T> = Box<dyn Fn(&T, Signal<Option<String>>) -> Result<(), FieldValidationState>>;
 
@@ -38,7 +39,8 @@ impl<T, Trigger> Rule<T, Trigger> {
         name: Signal<Option<String>>,
     ) -> Callback<Option<Trigger>, bool>
     where
-        V: WithUntracked<Value = T>,
+        V: RuleValueWithUntracked<T>,
+        // V: WithUntracked<Value = T>,
         V: Send + Sync + Copy + 'static,
         R: Deref<Target = Rule<T, Trigger>> + 'static,
         Trigger: PartialEq + 'static,
@@ -69,7 +71,7 @@ impl<T, Trigger> Rule<T, Trigger> {
                     }
                     call_count += 1;
 
-                    let state = value.with_untracked(|value| (rule.validator)(value, name));
+                    let state = value.value_with_untracked(|value| (rule.validator)(value, name));
                     if state.is_err() {
                         return Some(state);
                     }
@@ -93,3 +95,31 @@ impl<T, Trigger> Rule<T, Trigger> {
         validate
     }
 }
+
+pub trait RuleValueWithUntracked<T> {
+    fn value_with_untracked(
+        &self,
+        f: impl FnOnce(&T) -> Result<(), FieldValidationState>,
+    ) -> Result<(), FieldValidationState>;
+}
+
+impl<T: Send + Sync> RuleValueWithUntracked<T> for Model<T> {
+    fn value_with_untracked(
+        &self,
+        f: impl FnOnce(&T) -> Result<(), FieldValidationState>,
+    ) -> Result<(), FieldValidationState> {
+        self.with_untracked(move |v| f(v))
+    }
+}
+
+impl<T: Send + Sync + Clone> RuleValueWithUntracked<Option<T>> for OptionModel<T> {
+    fn value_with_untracked(
+        &self,
+        f: impl FnOnce(&Option<T>) -> Result<(), FieldValidationState>,
+    ) -> Result<(), FieldValidationState> {
+        self.with_untracked(move |v| {
+            let v = v.map(|v| v.clone());
+            f(&v)
+        })
+    }
+}
diff --git a/thaw/src/radio/docs/mod.md b/thaw/src/radio/docs/mod.md
index 4c57cbb..bd2c153 100644
--- a/thaw/src/radio/docs/mod.md
+++ b/thaw/src/radio/docs/mod.md
@@ -38,5 +38,5 @@ view! {
 | -------- | --------------------- | -------------------- | -------------------------------------- |
 | class    | `MaybeProp<String>`   | `Default::default()` |                                        |
 | value    | `OptionModel<String>` | `Default::default()` | The selected Radio item in this group. |
-| name     | `Option<String>`      | `None`               | The name of this radio group.          |
+| name     | `MaybeProp<String>`   | `None`               | The name of this radio group.          |
 | children | `Children`            |                      |                                        |
diff --git a/thaw/src/radio/mod.rs b/thaw/src/radio/mod.rs
index 421e835..e618bd4 100644
--- a/thaw/src/radio/mod.rs
+++ b/thaw/src/radio/mod.rs
@@ -1,6 +1,6 @@
 mod radio_group;
 
-pub use radio_group::RadioGroup;
+pub use radio_group::{RadioGroup, RadioGroupRule, RadioGroupRuleTrigger};
 
 use leptos::prelude::*;
 use radio_group::RadioGroupInjection;
diff --git a/thaw/src/radio/radio.css b/thaw/src/radio/radio.css
index 785bf92..b4cf7dd 100644
--- a/thaw/src/radio/radio.css
+++ b/thaw/src/radio/radio.css
@@ -1,3 +1,8 @@
+.thaw-radio-group {
+    display: flex;
+    align-items: flex-start;
+}
+
 .thaw-radio {
     display: inline-flex;
     position: relative;
diff --git a/thaw/src/radio/radio_group.rs b/thaw/src/radio/radio_group.rs
index 41a7ed5..e87ae22 100644
--- a/thaw/src/radio/radio_group.rs
+++ b/thaw/src/radio/radio_group.rs
@@ -1,25 +1,42 @@
+use crate::{FieldInjection, FieldValidationState, Rule};
 use leptos::{context::Provider, prelude::*};
+use std::ops::Deref;
 use thaw_utils::{class_list, OptionModel};
 
 #[component]
 pub fn RadioGroup(
     #[prop(optional, into)] class: MaybeProp<String>,
+    #[prop(optional, into)] id: MaybeProp<String>,
+    #[prop(optional, into)] rules: Vec<RadioGroupRule>,
     /// The selected Radio item in this group.
     #[prop(optional, into)]
     value: OptionModel<String>,
     /// The name of this radio group.
     #[prop(optional, into)]
-    name: Option<String>,
+    name: MaybeProp<String>,
     children: Children,
 ) -> impl IntoView {
-    let name = name.unwrap_or_else(|| uuid::Uuid::new_v4().to_string());
+    let (id, name) = FieldInjection::use_id_and_name(id, name);
+    let validate = Rule::validate(rules, value, name);
+
+    Effect::new(move |prev: Option<()>| {
+        value.with(|_| {});
+        if prev.is_some() {
+            validate.run(Some(RadioGroupRuleTrigger::Change));
+        }
+    });
+
+    let name = Signal::derive(move || {
+        name.get()
+            .unwrap_or_else(|| uuid::Uuid::new_v4().to_string())
+    });
 
     view! {
         <Provider value=RadioGroupInjection { value, name }>
             <div
                 class=class_list!["thaw-radio-group", class]
+                id=id
                 role="radiogroup"
-                style="display: flex;align-items: flex-start"
             >
                 {children()}
             </div>
@@ -30,7 +47,7 @@ pub fn RadioGroup(
 #[derive(Clone)]
 pub(crate) struct RadioGroupInjection {
     pub value: OptionModel<String>,
-    pub name: String,
+    pub name: Signal<String>,
 }
 
 impl RadioGroupInjection {
@@ -38,3 +55,61 @@ impl RadioGroupInjection {
         expect_context()
     }
 }
+
+#[derive(Debug, Default, PartialEq, Clone, Copy)]
+pub enum RadioGroupRuleTrigger {
+    #[default]
+    Change,
+}
+
+pub struct RadioGroupRule(Rule<Option<String>, RadioGroupRuleTrigger>);
+
+impl RadioGroupRule {
+    pub fn required(required: MaybeSignal<bool>) -> Self {
+        Self::validator(move |value, name| {
+            if required.get_untracked() && value.is_none() {
+                let message = name.get_untracked().map_or_else(
+                    || String::from("Please select!"),
+                    |name| format!("Please select {name}!"),
+                );
+                Err(FieldValidationState::Error(message))
+            } else {
+                Ok(())
+            }
+        })
+    }
+
+    pub fn required_with_message(
+        required: MaybeSignal<bool>,
+        message: MaybeSignal<String>,
+    ) -> Self {
+        Self::validator(move |value, _| {
+            if required.get_untracked() && value.is_none() {
+                Err(FieldValidationState::Error(message.get_untracked()))
+            } else {
+                Ok(())
+            }
+        })
+    }
+
+    pub fn validator(
+        f: impl Fn(&Option<String>, Signal<Option<String>>) -> Result<(), FieldValidationState>
+            + Send
+            + Sync
+            + 'static,
+    ) -> Self {
+        Self(Rule::validator(f))
+    }
+
+    pub fn with_trigger(self, trigger: RadioGroupRuleTrigger) -> Self {
+        Self(Rule::with_trigger(self.0, trigger))
+    }
+}
+
+impl Deref for RadioGroupRule {
+    type Target = Rule<Option<String>, RadioGroupRuleTrigger>;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
diff --git a/thaw_utils/src/signals/model/option_model.rs b/thaw_utils/src/signals/model/option_model.rs
index 37bb30b..ab8b86f 100644
--- a/thaw_utils/src/signals/model/option_model.rs
+++ b/thaw_utils/src/signals/model/option_model.rs
@@ -6,6 +6,7 @@ use leptos::reactive_graph::{
     wrappers::read::Signal,
 };
 
+#[derive(Debug)]
 pub enum OptionModel<T, S = SyncStorage>
 where
     T: 'static,
@@ -21,7 +22,7 @@ where
 
 impl<T: Default + Send + Sync> Default for OptionModel<T> {
     fn default() -> Self {
-        Self::new(Default::default())
+        Self::new_option(None)
     }
 }